new file mode 100644
@@ -0,0 +1,92 @@
+--- a/debugfs.c
++++ b/debugfs.c
+@@ -279,7 +279,6 @@ static void core_dump_file(u8 *valbuf, u
+ u32 append, u32 totallen, bool textmode)
+ {
+ struct file *filp_core = NULL;
+- mm_segment_t oldfs;
+ char file_name[40];
+ u8 *buf = kmalloc(length * 3, GFP_KERNEL);
+ u8 *data_p = buf;
+@@ -292,9 +291,6 @@ static void core_dump_file(u8 *valbuf, u
+ sprintf(file_name, "/dev/shm/coredump-%x-%x",
+ region, (region + totallen));
+
+- oldfs = get_fs();
+- set_fs(KERNEL_DS);
+-
+ if (append)
+ filp_core = filp_open(file_name, O_RDWR | O_APPEND, 0);
+ else
+@@ -317,15 +313,15 @@ static void core_dump_file(u8 *valbuf, u
+ }
+ data_p = buf + j;
+ data_p += sprintf(data_p, "\n");
+- vfs_write(filp_core, buf, strlen(buf),
+- &filp_core->f_pos);
++ kernel_write(filp_core, buf, strlen(buf),
++ &filp_core->f_pos);
+ } else
+- vfs_write(filp_core, valbuf, length, &filp_core->f_pos);
++ kernel_write(filp_core, valbuf, length,
++ &filp_core->f_pos);
+
+ filp_close(filp_core, current->files);
+ }
+
+- set_fs(oldfs);
+ kfree(buf);
+ }
+
+@@ -1338,7 +1334,6 @@ static ssize_t mwl_debugfs_ba_hist_read(
+ u8 bmap0flag, nobaflag;
+ char buff[500], file_location[20];
+ struct file *filp_bahisto;
+- mm_segment_t oldfs;
+ u8 *data_p = buff;
+ ssize_t ret;
+
+@@ -1354,13 +1349,10 @@ static ssize_t mwl_debugfs_ba_hist_read(
+ memset(file_location, 0, sizeof(file_location));
+ sprintf(file_location, "/tmp/ba_histo-%d", priv->ba_aid);
+
+- oldfs = get_fs();
+- set_fs(KERNEL_DS);
+ filp_bahisto = filp_open(file_location,
+ O_RDWR | O_CREAT | O_TRUNC, 0);
+
+ if (IS_ERR(filp_bahisto)) {
+- set_fs(oldfs);
+ ret = -EIO;
+ goto err;
+ }
+@@ -1401,8 +1393,8 @@ static ssize_t mwl_debugfs_ba_hist_read(
+
+ /* Buffer is full. Write to file and reset buf */
+ if ((strlen(buff) + 36) >= 500) {
+- vfs_write(filp_bahisto, buff, strlen(buff),
+- &filp_bahisto->f_pos);
++ kernel_write(filp_bahisto, buff, strlen(buff),
++ &filp_bahisto->f_pos);
+ mdelay(2);
+ memset(buff, 0, sizeof(buff));
+ data_p = buff;
+@@ -1426,8 +1418,8 @@ static ssize_t mwl_debugfs_ba_hist_read(
+ data_p += sprintf(data_p, "%8d\n", nobaflag);
+ }
+
+- vfs_write(filp_bahisto, buff, strlen(buff),
+- &filp_bahisto->f_pos);
++ kernel_write(filp_bahisto, buff, strlen(buff),
++ &filp_bahisto->f_pos);
+ len += scnprintf(p + len, size - len,
+ "hole: %d, expect: %d, bmap0: %d, noba: %d\n",
+ baholecnt, baexpcnt, bmap0cnt, nobacnt);
+@@ -1440,7 +1432,6 @@ static ssize_t mwl_debugfs_ba_hist_read(
+ priv->ba_aid);
+
+ filp_close(filp_bahisto, current->files);
+- set_fs(oldfs);
+
+ ret = simple_read_from_buffer(ubuf, count, ppos, p, len);
+
vfs_write() is not exported on kernel 4.14 any more and kernel_write() should be used instead. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> --- .../mwlwifi/patches/001-remove-vfs_write.patch | 92 ++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 package/kernel/mwlwifi/patches/001-remove-vfs_write.patch