mtd: remove alauda driver

The driver has very low utility.  Devices in question are limited to
about 400kB/s and the only known user (me) discarded the hardware
several years back.

Signed-off-by: Joern Engel <joern@logfs.org>
---
 arch/x86/mm/fault.c                        |    2 +-
 drivers/mtd/nand/Kconfig                   |    7 -
 drivers/mtd/nand/Makefile                  |    1 -
 drivers/mtd/nand/alauda.c                  |  723 ----------------------------
 drivers/target/target_core_tmr.c           |    3 +-
 fs/compat_ioctl.c                          |    1 -
 fs/logfs/readwrite.c                       |    5 +-
 fs/proc/array.c                            |    4 +-
 include/linux/sched.h                      |    2 +-
 kernel/acct.c                              |    2 +-
 kernel/exit.c                              |    4 +-
 kernel/fork.c                              |    2 +-
 kernel/sys.c                               |    2 +-
 kernel/tsacct.c                            |    2 +-
 mm/memory.c                                |   13 -
 tools/testing/selftests/vm/hugetlbfstest.c |   22 +-
 16 files changed, 34 insertions(+), 761 deletions(-)
 delete mode 100644 drivers/mtd/nand/alauda.c

On Mon, 19 August 2013 18:52:03 +0200, richard -rw- weinberger wrote:
> 
> Looks like some garbage went into your patch. ;)

Indeed.  I shouldn't send patches before first coffee.  Especially not
after taking a shower in the dark, thanks to the amazing electrical
infrastructure the "the world's leading industrial nation".

Jörn

--
Everything should be made as simple as possible, but not simpler.
-- Albert Einstein

On Mon, Aug 19, 2013 at 4:52 PM, Jörn Engel <joern@logfs.org> wrote:
> The driver has very low utility.  Devices in question are limited to
> about 400kB/s and the only known user (me) discarded the hardware
> several years back.
>
> Signed-off-by: Joern Engel <joern@logfs.org>
> ---
>  arch/x86/mm/fault.c                        |    2 +-
>  drivers/mtd/nand/Kconfig                   |    7 -
>  drivers/mtd/nand/Makefile                  |    1 -
>  drivers/mtd/nand/alauda.c                  |  723 ----------------------------
>  drivers/target/target_core_tmr.c           |    3 +-
>  fs/compat_ioctl.c                          |    1 -
>  fs/logfs/readwrite.c                       |    5 +-
>  fs/proc/array.c                            |    4 +-
>  include/linux/sched.h                      |    2 +-
>  kernel/acct.c                              |    2 +-
>  kernel/exit.c                              |    4 +-
>  kernel/fork.c                              |    2 +-
>  kernel/sys.c                               |    2 +-
>  kernel/tsacct.c                            |    2 +-
>  mm/memory.c                                |   13 -
>  tools/testing/selftests/vm/hugetlbfstest.c |   22 +-

Looks like some garbage went into your patch. ;)

>  16 files changed, 34 insertions(+), 761 deletions(-)
>  delete mode 100644 drivers/mtd/nand/alauda.c
>
> diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
> index 0e88336..959c22e 100644
> --- a/arch/x86/mm/fault.c
> +++ b/arch/x86/mm/fault.c
> @@ -1203,7 +1203,7 @@ good_area:
>                         perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1,
>                                       regs, address);
>                 } else {
> -                       tsk->min_flt++;
> +                       tsk->_min_flt++;
>                         perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1,
>                                       regs, address);
>                 }
> diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
> index 81bf5e5..2d46663 100644
> --- a/drivers/mtd/nand/Kconfig
> +++ b/drivers/mtd/nand/Kconfig
> @@ -462,13 +462,6 @@ config MTD_NAND_PLATFORM
>           devices. You will need to provide platform-specific functions
>           via platform_data.
>
> -config MTD_ALAUDA
> -       tristate "MTD driver for Olympus MAUSB-10 and Fujifilm DPC-R1"
> -       depends on USB
> -       help
> -         These two (and possibly other) Alauda-based cardreaders for
> -         SmartMedia and xD allow raw flash access.
> -
>  config MTD_NAND_ORION
>         tristate "NAND Flash support for Marvell Orion SoC"
>         depends on PLAT_ORION
> diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
> index d76d912..20746a5 100644
> --- a/drivers/mtd/nand/Makefile
> +++ b/drivers/mtd/nand/Makefile
> @@ -34,7 +34,6 @@ obj-$(CONFIG_MTD_NAND_CM_X270)                += cmx270_nand.o
>  obj-$(CONFIG_MTD_NAND_PXA3xx)          += pxa3xx_nand.o
>  obj-$(CONFIG_MTD_NAND_TMIO)            += tmio_nand.o
>  obj-$(CONFIG_MTD_NAND_PLATFORM)                += plat_nand.o
> -obj-$(CONFIG_MTD_ALAUDA)               += alauda.o
>  obj-$(CONFIG_MTD_NAND_PASEMI)          += pasemi_nand.o
>  obj-$(CONFIG_MTD_NAND_ORION)           += orion_nand.o
>  obj-$(CONFIG_MTD_NAND_FSL_ELBC)                += fsl_elbc_nand.o
> diff --git a/drivers/mtd/nand/alauda.c b/drivers/mtd/nand/alauda.c
> deleted file mode 100644
> index 60a0dfd..0000000
> --- a/drivers/mtd/nand/alauda.c
> +++ /dev/null
> @@ -1,723 +0,0 @@
> -/*
> - * MTD driver for Alauda chips
> - *
> - * Copyright (C) 2007 Joern Engel <joern@logfs.org>
> - *
> - * Based on drivers/usb/usb-skeleton.c which is:
> - * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
> - * and on drivers/usb/storage/alauda.c, which is:
> - *   (c) 2005 Daniel Drake <dsd@gentoo.org>
> - *
> - * Idea and initial work by Arnd Bergmann <arnd@arndb.de>
> - */
> -#include <linux/kernel.h>
> -#include <linux/errno.h>
> -#include <linux/init.h>
> -#include <linux/slab.h>
> -#include <linux/module.h>
> -#include <linux/kref.h>
> -#include <linux/usb.h>
> -#include <linux/mutex.h>
> -#include <linux/mtd/mtd.h>
> -#include <linux/mtd/nand_ecc.h>
> -
> -/* Control commands */
> -#define ALAUDA_GET_XD_MEDIA_STATUS     0x08
> -#define ALAUDA_ACK_XD_MEDIA_CHANGE     0x0a
> -#define ALAUDA_GET_XD_MEDIA_SIG                0x86
> -
> -/* Common prefix */
> -#define ALAUDA_BULK_CMD                        0x40
> -
> -/* The two ports */
> -#define ALAUDA_PORT_XD                 0x00
> -#define ALAUDA_PORT_SM                 0x01
> -
> -/* Bulk commands */
> -#define ALAUDA_BULK_READ_PAGE          0x84
> -#define ALAUDA_BULK_READ_OOB           0x85 /* don't use, there's a chip bug */
> -#define ALAUDA_BULK_READ_BLOCK         0x94
> -#define ALAUDA_BULK_ERASE_BLOCK                0xa3
> -#define ALAUDA_BULK_WRITE_PAGE         0xa4
> -#define ALAUDA_BULK_WRITE_BLOCK                0xb4
> -#define ALAUDA_BULK_RESET_MEDIA                0xe0
> -
> -/* Address shifting */
> -#define PBA_LO(pba) ((pba & 0xF) << 5)
> -#define PBA_HI(pba) (pba >> 3)
> -#define PBA_ZONE(pba) (pba >> 11)
> -
> -#define TIMEOUT HZ
> -
> -static const struct usb_device_id alauda_table[] = {
> -       { USB_DEVICE(0x0584, 0x0008) }, /* Fujifilm DPC-R1 */
> -       { USB_DEVICE(0x07b4, 0x010a) }, /* Olympus MAUSB-10 */
> -       { }
> -};
> -MODULE_DEVICE_TABLE(usb, alauda_table);
> -
> -struct alauda_card {
> -       u8      id;             /* id byte */
> -       u8      chipshift;      /* 1<<chipshift total size */
> -       u8      pageshift;      /* 1<<pageshift page size */
> -       u8      blockshift;     /* 1<<blockshift block size */
> -};
> -
> -struct alauda {
> -       struct usb_device       *dev;
> -       struct usb_interface    *interface;
> -       struct mtd_info         *mtd;
> -       struct alauda_card      *card;
> -       struct mutex            card_mutex;
> -       u32                     pagemask;
> -       u32                     bytemask;
> -       u32                     blockmask;
> -       unsigned int            write_out;
> -       unsigned int            bulk_in;
> -       unsigned int            bulk_out;
> -       u8                      port;
> -       struct kref             kref;
> -};
> -
> -static struct alauda_card alauda_card_ids[] = {
> -       /* NAND flash */
> -       { 0x6e, 20, 8, 12},     /* 1 MB */
> -       { 0xe8, 20, 8, 12},     /* 1 MB */
> -       { 0xec, 20, 8, 12},     /* 1 MB */
> -       { 0x64, 21, 8, 12},     /* 2 MB */
> -       { 0xea, 21, 8, 12},     /* 2 MB */
> -       { 0x6b, 22, 9, 13},     /* 4 MB */
> -       { 0xe3, 22, 9, 13},     /* 4 MB */
> -       { 0xe5, 22, 9, 13},     /* 4 MB */
> -       { 0xe6, 23, 9, 13},     /* 8 MB */
> -       { 0x73, 24, 9, 14},     /* 16 MB */
> -       { 0x75, 25, 9, 14},     /* 32 MB */
> -       { 0x76, 26, 9, 14},     /* 64 MB */
> -       { 0x79, 27, 9, 14},     /* 128 MB */
> -       { 0x71, 28, 9, 14},     /* 256 MB */
> -
> -       /* MASK ROM */
> -       { 0x5d, 21, 9, 13},     /* 2 MB */
> -       { 0xd5, 22, 9, 13},     /* 4 MB */
> -       { 0xd6, 23, 9, 13},     /* 8 MB */
> -       { 0x57, 24, 9, 13},     /* 16 MB */
> -       { 0x58, 25, 9, 13},     /* 32 MB */
> -       { }
> -};
> -
> -static struct alauda_card *get_card(u8 id)
> -{
> -       struct alauda_card *card;
> -
> -       for (card = alauda_card_ids; card->id; card++)
> -               if (card->id == id)
> -                       return card;
> -       return NULL;
> -}
> -
> -static void alauda_delete(struct kref *kref)
> -{
> -       struct alauda *al = container_of(kref, struct alauda, kref);
> -
> -       if (al->mtd) {
> -               mtd_device_unregister(al->mtd);
> -               kfree(al->mtd);
> -       }
> -       usb_put_dev(al->dev);
> -       kfree(al);
> -}
> -
> -static int alauda_get_media_status(struct alauda *al, void *buf)
> -{
> -       int ret;
> -
> -       mutex_lock(&al->card_mutex);
> -       ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
> -                       ALAUDA_GET_XD_MEDIA_STATUS, 0xc0, 0, 1, buf, 2, HZ);
> -       mutex_unlock(&al->card_mutex);
> -       return ret;
> -}
> -
> -static int alauda_ack_media(struct alauda *al)
> -{
> -       int ret;
> -
> -       mutex_lock(&al->card_mutex);
> -       ret = usb_control_msg(al->dev, usb_sndctrlpipe(al->dev, 0),
> -                       ALAUDA_ACK_XD_MEDIA_CHANGE, 0x40, 0, 1, NULL, 0, HZ);
> -       mutex_unlock(&al->card_mutex);
> -       return ret;
> -}
> -
> -static int alauda_get_media_signatures(struct alauda *al, void *buf)
> -{
> -       int ret;
> -
> -       mutex_lock(&al->card_mutex);
> -       ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
> -                       ALAUDA_GET_XD_MEDIA_SIG, 0xc0, 0, 0, buf, 4, HZ);
> -       mutex_unlock(&al->card_mutex);
> -       return ret;
> -}
> -
> -static void alauda_reset(struct alauda *al)
> -{
> -       u8 command[] = {
> -               ALAUDA_BULK_CMD, ALAUDA_BULK_RESET_MEDIA, 0, 0,
> -               0, 0, 0, 0, al->port
> -       };
> -       mutex_lock(&al->card_mutex);
> -       usb_bulk_msg(al->dev, al->bulk_out, command, 9, NULL, HZ);
> -       mutex_unlock(&al->card_mutex);
> -}
> -
> -static void correct_data(void *buf, void *read_ecc,
> -               int *corrected, int *uncorrected)
> -{
> -       u8 calc_ecc[3];
> -       int err;
> -
> -       nand_calculate_ecc(NULL, buf, calc_ecc);
> -       err = nand_correct_data(NULL, buf, read_ecc, calc_ecc);
> -       if (err) {
> -               if (err > 0)
> -                       (*corrected)++;
> -               else
> -                       (*uncorrected)++;
> -       }
> -}
> -
> -struct alauda_sg_request {
> -       struct urb *urb[3];
> -       struct completion comp;
> -};
> -
> -static void alauda_complete(struct urb *urb)
> -{
> -       struct completion *comp = urb->context;
> -
> -       if (comp)
> -               complete(comp);
> -}
> -
> -static int __alauda_read_page(struct mtd_info *mtd, loff_t from, void *buf,
> -               void *oob)
> -{
> -       struct alauda_sg_request sg;
> -       struct alauda *al = mtd->priv;
> -       u32 pba = from >> al->card->blockshift;
> -       u32 page = (from >> al->card->pageshift) & al->pagemask;
> -       u8 command[] = {
> -               ALAUDA_BULK_CMD, ALAUDA_BULK_READ_PAGE, PBA_HI(pba),
> -               PBA_ZONE(pba), 0, PBA_LO(pba) + page, 1, 0, al->port
> -       };
> -       int i, err;
> -
> -       for (i=0; i<3; i++)
> -               sg.urb[i] = NULL;
> -
> -       err = -ENOMEM;
> -       for (i=0; i<3; i++) {
> -               sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
> -               if (!sg.urb[i])
> -                       goto out;
> -       }
> -       init_completion(&sg.comp);
> -       usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
> -                       alauda_complete, NULL);
> -       usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, mtd->writesize,
> -                       alauda_complete, NULL);
> -       usb_fill_bulk_urb(sg.urb[2], al->dev, al->bulk_in, oob, 16,
> -                       alauda_complete, &sg.comp);
> -
> -       mutex_lock(&al->card_mutex);
> -       for (i=0; i<3; i++) {
> -               err = usb_submit_urb(sg.urb[i], GFP_NOIO);
> -               if (err)
> -                       goto cancel;
> -       }
> -       if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
> -               err = -ETIMEDOUT;
> -cancel:
> -               for (i=0; i<3; i++) {
> -                       usb_kill_urb(sg.urb[i]);
> -               }
> -       }
> -       mutex_unlock(&al->card_mutex);
> -
> -out:
> -       usb_free_urb(sg.urb[0]);
> -       usb_free_urb(sg.urb[1]);
> -       usb_free_urb(sg.urb[2]);
> -       return err;
> -}
> -
> -static int alauda_read_page(struct mtd_info *mtd, loff_t from,
> -               void *buf, u8 *oob, int *corrected, int *uncorrected)
> -{
> -       int err;
> -
> -       err = __alauda_read_page(mtd, from, buf, oob);
> -       if (err)
> -               return err;
> -       correct_data(buf, oob+13, corrected, uncorrected);
> -       correct_data(buf+256, oob+8, corrected, uncorrected);
> -       return 0;
> -}
> -
> -static int alauda_write_page(struct mtd_info *mtd, loff_t to, void *buf,
> -               void *oob)
> -{
> -       struct alauda_sg_request sg;
> -       struct alauda *al = mtd->priv;
> -       u32 pba = to >> al->card->blockshift;
> -       u32 page = (to >> al->card->pageshift) & al->pagemask;
> -       u8 command[] = {
> -               ALAUDA_BULK_CMD, ALAUDA_BULK_WRITE_PAGE, PBA_HI(pba),
> -               PBA_ZONE(pba), 0, PBA_LO(pba) + page, 32, 0, al->port
> -       };
> -       int i, err;
> -
> -       for (i=0; i<3; i++)
> -               sg.urb[i] = NULL;
> -
> -       err = -ENOMEM;
> -       for (i=0; i<3; i++) {
> -               sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
> -               if (!sg.urb[i])
> -                       goto out;
> -       }
> -       init_completion(&sg.comp);
> -       usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
> -                       alauda_complete, NULL);
> -       usb_fill_bulk_urb(sg.urb[1], al->dev, al->write_out, buf,mtd->writesize,
> -                       alauda_complete, NULL);
> -       usb_fill_bulk_urb(sg.urb[2], al->dev, al->write_out, oob, 16,
> -                       alauda_complete, &sg.comp);
> -
> -       mutex_lock(&al->card_mutex);
> -       for (i=0; i<3; i++) {
> -               err = usb_submit_urb(sg.urb[i], GFP_NOIO);
> -               if (err)
> -                       goto cancel;
> -       }
> -       if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
> -               err = -ETIMEDOUT;
> -cancel:
> -               for (i=0; i<3; i++) {
> -                       usb_kill_urb(sg.urb[i]);
> -               }
> -       }
> -       mutex_unlock(&al->card_mutex);
> -
> -out:
> -       usb_free_urb(sg.urb[0]);
> -       usb_free_urb(sg.urb[1]);
> -       usb_free_urb(sg.urb[2]);
> -       return err;
> -}
> -
> -static int alauda_erase_block(struct mtd_info *mtd, loff_t ofs)
> -{
> -       struct alauda_sg_request sg;
> -       struct alauda *al = mtd->priv;
> -       u32 pba = ofs >> al->card->blockshift;
> -       u8 command[] = {
> -               ALAUDA_BULK_CMD, ALAUDA_BULK_ERASE_BLOCK, PBA_HI(pba),
> -               PBA_ZONE(pba), 0, PBA_LO(pba), 0x02, 0, al->port
> -       };
> -       u8 buf[2];
> -       int i, err;
> -
> -       for (i=0; i<2; i++)
> -               sg.urb[i] = NULL;
> -
> -       err = -ENOMEM;
> -       for (i=0; i<2; i++) {
> -               sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
> -               if (!sg.urb[i])
> -                       goto out;
> -       }
> -       init_completion(&sg.comp);
> -       usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
> -                       alauda_complete, NULL);
> -       usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, 2,
> -                       alauda_complete, &sg.comp);
> -
> -       mutex_lock(&al->card_mutex);
> -       for (i=0; i<2; i++) {
> -               err = usb_submit_urb(sg.urb[i], GFP_NOIO);
> -               if (err)
> -                       goto cancel;
> -       }
> -       if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
> -               err = -ETIMEDOUT;
> -cancel:
> -               for (i=0; i<2; i++) {
> -                       usb_kill_urb(sg.urb[i]);
> -               }
> -       }
> -       mutex_unlock(&al->card_mutex);
> -
> -out:
> -       usb_free_urb(sg.urb[0]);
> -       usb_free_urb(sg.urb[1]);
> -       return err;
> -}
> -
> -static int alauda_read_oob(struct mtd_info *mtd, loff_t from, void *oob)
> -{
> -       static u8 ignore_buf[512]; /* write only */
> -
> -       return __alauda_read_page(mtd, from, ignore_buf, oob);
> -}
> -
> -static int alauda_isbad(struct mtd_info *mtd, loff_t ofs)
> -{
> -       u8 oob[16];
> -       int err;
> -
> -       err = alauda_read_oob(mtd, ofs, oob);
> -       if (err)
> -               return err;
> -
> -       /* A block is marked bad if two or more bits are zero */
> -       return hweight8(oob[5]) >= 7 ? 0 : 1;
> -}
> -
> -static int alauda_bounce_read(struct mtd_info *mtd, loff_t from, size_t len,
> -               size_t *retlen, u_char *buf)
> -{
> -       struct alauda *al = mtd->priv;
> -       void *bounce_buf;
> -       int err, corrected=0, uncorrected=0;
> -
> -       bounce_buf = kmalloc(mtd->writesize, GFP_KERNEL);
> -       if (!bounce_buf)
> -               return -ENOMEM;
> -
> -       *retlen = len;
> -       while (len) {
> -               u8 oob[16];
> -               size_t byte = from & al->bytemask;
> -               size_t cplen = min(len, mtd->writesize - byte);
> -
> -               err = alauda_read_page(mtd, from, bounce_buf, oob,
> -                               &corrected, &uncorrected);
> -               if (err)
> -                       goto out;
> -
> -               memcpy(buf, bounce_buf + byte, cplen);
> -               buf += cplen;
> -               from += cplen;
> -               len -= cplen;
> -       }
> -       err = 0;
> -       if (corrected)
> -               err = 1;        /* return max_bitflips per ecc step */
> -       if (uncorrected)
> -               err = -EBADMSG;
> -out:
> -       kfree(bounce_buf);
> -       return err;
> -}
> -
> -static int alauda_read(struct mtd_info *mtd, loff_t from, size_t len,
> -               size_t *retlen, u_char *buf)
> -{
> -       struct alauda *al = mtd->priv;
> -       int err, corrected=0, uncorrected=0;
> -
> -       if ((from & al->bytemask) || (len & al->bytemask))
> -               return alauda_bounce_read(mtd, from, len, retlen, buf);
> -
> -       *retlen = len;
> -       while (len) {
> -               u8 oob[16];
> -
> -               err = alauda_read_page(mtd, from, buf, oob,
> -                               &corrected, &uncorrected);
> -               if (err)
> -                       return err;
> -
> -               buf += mtd->writesize;
> -               from += mtd->writesize;
> -               len -= mtd->writesize;
> -       }
> -       err = 0;
> -       if (corrected)
> -               err = 1;        /* return max_bitflips per ecc step */
> -       if (uncorrected)
> -               err = -EBADMSG;
> -       return err;
> -}
> -
> -static int alauda_write(struct mtd_info *mtd, loff_t to, size_t len,
> -               size_t *retlen, const u_char *buf)
> -{
> -       struct alauda *al = mtd->priv;
> -       int err;
> -
> -       if ((to & al->bytemask) || (len & al->bytemask))
> -               return -EINVAL;
> -
> -       *retlen = len;
> -       while (len) {
> -               u32 page = (to >> al->card->pageshift) & al->pagemask;
> -               u8 oob[16] = {  'h', 'e', 'l', 'l', 'o', 0xff, 0xff, 0xff,
> -                               0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
> -
> -               /* don't write to bad blocks */
> -               if (page == 0) {
> -                       err = alauda_isbad(mtd, to);
> -                       if (err) {
> -                               return -EIO;
> -                       }
> -               }
> -               nand_calculate_ecc(mtd, buf, &oob[13]);
> -               nand_calculate_ecc(mtd, buf+256, &oob[8]);
> -
> -               err = alauda_write_page(mtd, to, (void*)buf, oob);
> -               if (err)
> -                       return err;
> -
> -               buf += mtd->writesize;
> -               to += mtd->writesize;
> -               len -= mtd->writesize;
> -       }
> -       return 0;
> -}
> -
> -static int __alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
> -{
> -       struct alauda *al = mtd->priv;
> -       u32 ofs = instr->addr;
> -       u32 len = instr->len;
> -       int err;
> -
> -       if ((ofs & al->blockmask) || (len & al->blockmask))
> -               return -EINVAL;
> -
> -       while (len) {
> -               /* don't erase bad blocks */
> -               err = alauda_isbad(mtd, ofs);
> -               if (err > 0)
> -                       err = -EIO;
> -               if (err < 0)
> -                       return err;
> -
> -               err = alauda_erase_block(mtd, ofs);
> -               if (err < 0)
> -                       return err;
> -
> -               ofs += mtd->erasesize;
> -               len -= mtd->erasesize;
> -       }
> -       return 0;
> -}
> -
> -static int alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
> -{
> -       int err;
> -
> -       err = __alauda_erase(mtd, instr);
> -       instr->state = err ? MTD_ERASE_FAILED : MTD_ERASE_DONE;
> -       mtd_erase_callback(instr);
> -       return err;
> -}
> -
> -static int alauda_init_media(struct alauda *al)
> -{
> -       u8 buf[4], *b0=buf, *b1=buf+1;
> -       struct alauda_card *card;
> -       struct mtd_info *mtd;
> -       int err;
> -
> -       mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
> -       if (!mtd)
> -               return -ENOMEM;
> -
> -       for (;;) {
> -               err = alauda_get_media_status(al, buf);
> -               if (err < 0)
> -                       goto error;
> -               if (*b0 & 0x10)
> -                       break;
> -               msleep(20);
> -       }
> -
> -       err = alauda_ack_media(al);
> -       if (err)
> -               goto error;
> -
> -       msleep(10);
> -
> -       err = alauda_get_media_status(al, buf);
> -       if (err < 0)
> -               goto error;
> -
> -       if (*b0 != 0x14) {
> -               /* media not ready */
> -               err = -EIO;
> -               goto error;
> -       }
> -       err = alauda_get_media_signatures(al, buf);
> -       if (err < 0)
> -               goto error;
> -
> -       card = get_card(*b1);
> -       if (!card) {
> -               printk(KERN_ERR"Alauda: unknown card id %02x\n", *b1);
> -               err = -EIO;
> -               goto error;
> -       }
> -       printk(KERN_INFO"pagesize=%x\nerasesize=%x\nsize=%xMiB\n",
> -                       1<<card->pageshift, 1<<card->blockshift,
> -                       1<<(card->chipshift-20));
> -       al->card = card;
> -       al->pagemask = (1 << (card->blockshift - card->pageshift)) - 1;
> -       al->bytemask = (1 << card->pageshift) - 1;
> -       al->blockmask = (1 << card->blockshift) - 1;
> -
> -       mtd->name = "alauda";
> -       mtd->size = 1<<card->chipshift;
> -       mtd->erasesize = 1<<card->blockshift;
> -       mtd->writesize = 1<<card->pageshift;
> -       mtd->type = MTD_NANDFLASH;
> -       mtd->flags = MTD_CAP_NANDFLASH;
> -       mtd->_read = alauda_read;
> -       mtd->_write = alauda_write;
> -       mtd->_erase = alauda_erase;
> -       mtd->_block_isbad = alauda_isbad;
> -       mtd->priv = al;
> -       mtd->owner = THIS_MODULE;
> -       mtd->ecc_strength = 1;
> -
> -       err = mtd_device_register(mtd, NULL, 0);
> -       if (err) {
> -               err = -ENFILE;
> -               goto error;
> -       }
> -
> -       al->mtd = mtd;
> -       alauda_reset(al); /* no clue whether this is necessary */
> -       return 0;
> -error:
> -       kfree(mtd);
> -       return err;
> -}
> -
> -static int alauda_check_media(struct alauda *al)
> -{
> -       u8 buf[2], *b0 = buf, *b1 = buf+1;
> -       int err;
> -
> -       err = alauda_get_media_status(al, buf);
> -       if (err < 0)
> -               return err;
> -
> -       if ((*b1 & 0x01) == 0) {
> -               /* door open */
> -               return -EIO;
> -       }
> -       if ((*b0 & 0x80) || ((*b0 & 0x1F) == 0x10)) {
> -               /* no media ? */
> -               return -EIO;
> -       }
> -       if (*b0 & 0x08) {
> -               /* media change ? */
> -               return alauda_init_media(al);
> -       }
> -       return 0;
> -}
> -
> -static int alauda_probe(struct usb_interface *interface,
> -               const struct usb_device_id *id)
> -{
> -       struct alauda *al;
> -       struct usb_host_interface *iface;
> -       struct usb_endpoint_descriptor *ep,
> -                       *ep_in=NULL, *ep_out=NULL, *ep_wr=NULL;
> -       int i, err = -ENOMEM;
> -
> -       al = kzalloc(2*sizeof(*al), GFP_KERNEL);
> -       if (!al)
> -               goto error;
> -
> -       kref_init(&al->kref);
> -       usb_set_intfdata(interface, al);
> -
> -       al->dev = usb_get_dev(interface_to_usbdev(interface));
> -       al->interface = interface;
> -
> -       iface = interface->cur_altsetting;
> -       for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
> -               ep = &iface->endpoint[i].desc;
> -
> -               if (usb_endpoint_is_bulk_in(ep)) {
> -                       ep_in = ep;
> -               } else if (usb_endpoint_is_bulk_out(ep)) {
> -                       if (i==0)
> -                               ep_wr = ep;
> -                       else
> -                               ep_out = ep;
> -               }
> -       }
> -       err = -EIO;
> -       if (!ep_wr || !ep_in || !ep_out)
> -               goto error;
> -
> -       al->write_out = usb_sndbulkpipe(al->dev,
> -                       usb_endpoint_num(ep_wr));
> -       al->bulk_in = usb_rcvbulkpipe(al->dev,
> -                       usb_endpoint_num(ep_in));
> -       al->bulk_out = usb_sndbulkpipe(al->dev,
> -                       usb_endpoint_num(ep_out));
> -
> -       /* second device is identical up to now */
> -       memcpy(al+1, al, sizeof(*al));
> -
> -       mutex_init(&al[0].card_mutex);
> -       mutex_init(&al[1].card_mutex);
> -
> -       al[0].port = ALAUDA_PORT_XD;
> -       al[1].port = ALAUDA_PORT_SM;
> -
> -       dev_info(&interface->dev, "alauda probed\n");
> -       alauda_check_media(al);
> -       alauda_check_media(al+1);
> -
> -       return 0;
> -
> -error:
> -       if (al)
> -               kref_put(&al->kref, alauda_delete);
> -       return err;
> -}
> -
> -static void alauda_disconnect(struct usb_interface *interface)
> -{
> -       struct alauda *al;
> -
> -       al = usb_get_intfdata(interface);
> -       usb_set_intfdata(interface, NULL);
> -
> -       /* FIXME: prevent more I/O from starting */
> -
> -       /* decrement our usage count */
> -       if (al)
> -               kref_put(&al->kref, alauda_delete);
> -
> -       dev_info(&interface->dev, "alauda gone");
> -}
> -
> -static struct usb_driver alauda_driver = {
> -       .name =         "alauda",
> -       .probe =        alauda_probe,
> -       .disconnect =   alauda_disconnect,
> -       .id_table =     alauda_table,
> -};
> -
> -module_usb_driver(alauda_driver);
> -
> -MODULE_LICENSE("GPL");
> diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
> index d0b4dd9..94e6b57 100644
> --- a/drivers/target/target_core_tmr.c
> +++ b/drivers/target/target_core_tmr.c
> @@ -186,7 +186,6 @@ static void core_tmr_drain_tmr_list(
>         struct se_tmr_req *tmr,
>         struct list_head *preempt_and_abort_list)
>  {
> -       LIST_HEAD(drain_tmr_list);
>         struct se_tmr_req *tmr_p, *tmr_pp;
>         struct se_cmd *cmd;
>         unsigned long flags;
> @@ -224,9 +223,9 @@ static void core_tmr_drain_tmr_list(
>                         spin_unlock(&cmd->t_state_lock);
>                         continue;
>                 }
> +               cmd->transport_state |= CMD_T_ABORTED;
>                 spin_unlock(&cmd->t_state_lock);
>
> -               list_move_tail(&tmr_p->tmr_list, &drain_tmr_list);
>         }
>         spin_unlock_irqrestore(&dev->se_tmr_lock, flags);
>
> diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
> index 3ced75f..996cdc5 100644
> --- a/fs/compat_ioctl.c
> +++ b/fs/compat_ioctl.c
> @@ -608,7 +608,6 @@ struct serial_struct32 {
>  static int serial_struct_ioctl(unsigned fd, unsigned cmd,
>                         struct serial_struct32 __user *ss32)
>  {
> -        typedef struct serial_struct SS;
>          typedef struct serial_struct32 SS32;
>          int err;
>          struct serial_struct ss;
> diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
> index 9a59cba..2547b8b 100644
> --- a/fs/logfs/readwrite.c
> +++ b/fs/logfs/readwrite.c
> @@ -1279,9 +1279,8 @@ static void fill_shadow_tree(struct inode *inode, struct page *page,
>         struct shadow_tree *tree = &super->s_shadow_tree;
>
>         if (PagePrivate(page)) {
> -               if (block->alias_map)
> -                       super->s_no_object_aliases -= bitmap_weight(
> -                                       block->alias_map, LOGFS_BLOCK_FACTOR);
> +               super->s_no_object_aliases -= bitmap_weight(
> +                               block->alias_map, LOGFS_BLOCK_FACTOR);
>                 logfs_handle_transaction(inode, block->ta);
>                 block->ops->free_block(inode->i_sb, block);
>         }
> diff --git a/fs/proc/array.c b/fs/proc/array.c
> index cbd0f1b..f7f6ce5 100644
> --- a/fs/proc/array.c
> +++ b/fs/proc/array.c
> @@ -448,7 +448,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
>                 if (whole) {
>                         struct task_struct *t = task;
>                         do {
> -                               min_flt += t->min_flt;
> +                               min_flt += t->_min_flt;
>                                 maj_flt += t->maj_flt;
>                                 gtime += task_gtime(t);
>                                 t = next_thread(t);
> @@ -470,7 +470,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
>         if (permitted && (!whole || num_threads < 2))
>                 wchan = get_wchan(task);
>         if (!whole) {
> -               min_flt = task->min_flt;
> +               min_flt = task->_min_flt;
>                 maj_flt = task->maj_flt;
>                 task_cputime_adjusted(task, &utime, &stime);
>                 gtime = task_gtime(task);
> diff --git a/include/linux/sched.h b/include/linux/sched.h
> index e692a02..8516bbe 100644
> --- a/include/linux/sched.h
> +++ b/include/linux/sched.h
> @@ -1344,7 +1344,7 @@ struct task_struct {
>         struct timespec start_time;             /* monotonic time */
>         struct timespec real_start_time;        /* boot based time */
>  /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
> -       unsigned long min_flt, maj_flt;
> +       unsigned long _min_flt, maj_flt;
>
>         struct task_cputime cputime_expires;
>         struct list_head cpu_timers[3];
> diff --git a/kernel/acct.c b/kernel/acct.c
> index b9bd7f0..505d760 100644
> --- a/kernel/acct.c
> +++ b/kernel/acct.c
> @@ -597,7 +597,7 @@ void acct_collect(long exitcode, int group_dead)
>         task_cputime(current, &utime, &stime);
>         pacct->ac_utime += utime;
>         pacct->ac_stime += stime;
> -       pacct->ac_minflt += current->min_flt;
> +       pacct->ac_minflt += current->_min_flt;
>         pacct->ac_majflt += current->maj_flt;
>         spin_unlock_irq(&current->sighand->siglock);
>  }
> diff --git a/kernel/exit.c b/kernel/exit.c
> index 60bc027..346abe7 100644
> --- a/kernel/exit.c
> +++ b/kernel/exit.c
> @@ -128,7 +128,7 @@ static void __exit_signal(struct task_struct *tsk)
>                 sig->utime += utime;
>                 sig->stime += stime;
>                 sig->gtime += task_gtime(tsk);
> -               sig->min_flt += tsk->min_flt;
> +               sig->min_flt += tsk->_min_flt;
>                 sig->maj_flt += tsk->maj_flt;
>                 sig->nvcsw += tsk->nvcsw;
>                 sig->nivcsw += tsk->nivcsw;
> @@ -1096,7 +1096,7 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
>                 psig->cstime += tgstime + sig->cstime;
>                 psig->cgtime += task_gtime(p) + sig->gtime + sig->cgtime;
>                 psig->cmin_flt +=
> -                       p->min_flt + sig->min_flt + sig->cmin_flt;
> +                       p->_min_flt + sig->min_flt + sig->cmin_flt;
>                 psig->cmaj_flt +=
>                         p->maj_flt + sig->maj_flt + sig->cmaj_flt;
>                 psig->cnvcsw +=
> diff --git a/kernel/fork.c b/kernel/fork.c
> index 1766d32..70b72d0 100644
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -869,7 +869,7 @@ static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
>         struct mm_struct *mm, *oldmm;
>         int retval;
>
> -       tsk->min_flt = tsk->maj_flt = 0;
> +       tsk->_min_flt = tsk->maj_flt = 0;
>         tsk->nvcsw = tsk->nivcsw = 0;
>  #ifdef CONFIG_DETECT_HUNG_TASK
>         tsk->last_switch_count = tsk->nvcsw + tsk->nivcsw;
> diff --git a/kernel/sys.c b/kernel/sys.c
> index 0da73cf..8123e70 100644
> --- a/kernel/sys.c
> +++ b/kernel/sys.c
> @@ -1690,7 +1690,7 @@ static void accumulate_thread_rusage(struct task_struct *t, struct rusage *r)
>  {
>         r->ru_nvcsw += t->nvcsw;
>         r->ru_nivcsw += t->nivcsw;
> -       r->ru_minflt += t->min_flt;
> +       r->ru_minflt += t->_min_flt;
>         r->ru_majflt += t->maj_flt;
>         r->ru_inblock += task_io_get_inblock(t);
>         r->ru_oublock += task_io_get_oublock(t);
> diff --git a/kernel/tsacct.c b/kernel/tsacct.c
> index a1dd9a1..f83abb9 100644
> --- a/kernel/tsacct.c
> +++ b/kernel/tsacct.c
> @@ -75,7 +75,7 @@ void bacct_add_tsk(struct user_namespace *user_ns,
>         stats->ac_utimescaled = cputime_to_usecs(utimescaled);
>         stats->ac_stimescaled = cputime_to_usecs(stimescaled);
>
> -       stats->ac_minflt = tsk->min_flt;
> +       stats->ac_minflt = tsk->_min_flt;
>         stats->ac_majflt = tsk->maj_flt;
>
>         strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
> diff --git a/mm/memory.c b/mm/memory.c
> index ba94dec..652240a 100644
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -1849,13 +1849,6 @@ long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
>                                         BUG();
>                                 }
>
> -                               if (tsk) {
> -                                       if (ret & VM_FAULT_MAJOR)
> -                                               tsk->maj_flt++;
> -                                       else
> -                                               tsk->min_flt++;
> -                               }
> -
>                                 if (ret & VM_FAULT_RETRY) {
>                                         if (nonblocking)
>                                                 *nonblocking = 0;
> @@ -1953,12 +1946,6 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
>                         return -EFAULT;
>                 BUG();
>         }
> -       if (tsk) {
> -               if (ret & VM_FAULT_MAJOR)
> -                       tsk->maj_flt++;
> -               else
> -                       tsk->min_flt++;
> -       }
>         return 0;
>  }
>
> diff --git a/tools/testing/selftests/vm/hugetlbfstest.c b/tools/testing/selftests/vm/hugetlbfstest.c
> index ea40ff8..74d4782 100644
> --- a/tools/testing/selftests/vm/hugetlbfstest.c
> +++ b/tools/testing/selftests/vm/hugetlbfstest.c
> @@ -5,7 +5,9 @@
>  #include <stdlib.h>
>  #include <string.h>
>  #include <sys/mman.h>
> +#include <sys/resource.h>
>  #include <sys/stat.h>
> +#include <sys/time.h>
>  #include <sys/types.h>
>  #include <unistd.h>
>
> @@ -29,9 +31,24 @@ static u64 read_rss(void)
>         return rss << 12; /* assumes 4k pagesize */
>  }
>
> +static void check_for_page_faults(void *p)
> +{
> +       struct rusage before, after;
> +       int err;
> +
> +       err = getrusage(RUSAGE_SELF, &before);
> +       assert(!err);
> +       memset(p, 1, length);
> +       err = getrusage(RUSAGE_SELF, &after);
> +       assert(!err);
> +       printf("minor/major faults: %ld %ld\n",
> +                       after.ru_minflt - before.ru_minflt,
> +                       after.ru_majflt - before.ru_majflt);
> +}
> +
>  static void do_mmap(int fd, int extra_flags, int unmap)
>  {
> -       int *p;
> +       void *p;
>         int flags = MAP_PRIVATE | MAP_POPULATE | extra_flags;
>         u64 before, after;
>
> @@ -42,6 +59,9 @@ static void do_mmap(int fd, int extra_flags, int unmap)
>         after = read_rss();
>         assert(llabs(after - before - length) < 0x40000 ||
>                         !"rss didn't grow as expected");
> +
> +       check_for_page_faults(p);
> +
>         if (!unmap)
>                 return;
>         munmap(p, length);
> --
> 1.7.10.4
>
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