| Message ID | 1475874544-24842-13-git-send-email-ross.zwisler@linux.intel.com |
|---|---|
| State | Superseded, archived |
| Headers | show |
Looks fine,
Reviewed-by: Christoph Hellwig <hch@lst.de>
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On Fri 07-10-16 15:08:59, Ross Zwisler wrote: > To be able to correctly calculate the sector from a file position and a > struct iomap there is a complex little bit of logic that currently happens > in both dax_iomap_actor() and dax_iomap_fault(). This will need to be > repeated yet again in the DAX PMD fault handler when it is added, so break > it out into a helper function. > > Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Looks good. You can add: Reviewed-by: Jan Kara <jack@suse.cz> Honza > --- > fs/dax.c | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > > diff --git a/fs/dax.c b/fs/dax.c > index 982ccbb..7689ab0 100644 > --- a/fs/dax.c > +++ b/fs/dax.c > @@ -1023,6 +1023,11 @@ int dax_truncate_page(struct inode *inode, loff_t from, get_block_t get_block) > EXPORT_SYMBOL_GPL(dax_truncate_page); > > #ifdef CONFIG_FS_IOMAP > +static inline sector_t dax_iomap_sector(struct iomap *iomap, loff_t pos) > +{ > + return iomap->blkno + (((pos & PAGE_MASK) - iomap->offset) >> 9); > +} > + > static loff_t > dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, > struct iomap *iomap) > @@ -1048,8 +1053,7 @@ dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, > struct blk_dax_ctl dax = { 0 }; > ssize_t map_len; > > - dax.sector = iomap->blkno + > - (((pos & PAGE_MASK) - iomap->offset) >> 9); > + dax.sector = dax_iomap_sector(iomap, pos); > dax.size = (length + offset + PAGE_SIZE - 1) & PAGE_MASK; > map_len = dax_map_atomic(iomap->bdev, &dax); > if (map_len < 0) { > @@ -1186,7 +1190,7 @@ int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf, > goto unlock_entry; > } > > - sector = iomap.blkno + (((pos & PAGE_MASK) - iomap.offset) >> 9); > + sector = dax_iomap_sector(&iomap, pos); > > if (vmf->cow_page) { > switch (iomap.type) { > -- > 2.7.4 > >
diff --git a/fs/dax.c b/fs/dax.c index 982ccbb..7689ab0 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1023,6 +1023,11 @@ int dax_truncate_page(struct inode *inode, loff_t from, get_block_t get_block) EXPORT_SYMBOL_GPL(dax_truncate_page); #ifdef CONFIG_FS_IOMAP +static inline sector_t dax_iomap_sector(struct iomap *iomap, loff_t pos) +{ + return iomap->blkno + (((pos & PAGE_MASK) - iomap->offset) >> 9); +} + static loff_t dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, struct iomap *iomap) @@ -1048,8 +1053,7 @@ dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, struct blk_dax_ctl dax = { 0 }; ssize_t map_len; - dax.sector = iomap->blkno + - (((pos & PAGE_MASK) - iomap->offset) >> 9); + dax.sector = dax_iomap_sector(iomap, pos); dax.size = (length + offset + PAGE_SIZE - 1) & PAGE_MASK; map_len = dax_map_atomic(iomap->bdev, &dax); if (map_len < 0) { @@ -1186,7 +1190,7 @@ int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf, goto unlock_entry; } - sector = iomap.blkno + (((pos & PAGE_MASK) - iomap.offset) >> 9); + sector = dax_iomap_sector(&iomap, pos); if (vmf->cow_page) { switch (iomap.type) {
To be able to correctly calculate the sector from a file position and a struct iomap there is a complex little bit of logic that currently happens in both dax_iomap_actor() and dax_iomap_fault(). This will need to be repeated yet again in the DAX PMD fault handler when it is added, so break it out into a helper function. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> --- fs/dax.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)