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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-03-27 04:42:55 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-03-27 04:42:55 +0400 |
commit | de55eb1d60d2ed0f1ba5e13226d91b3bfbe1c108 (patch) | |
tree | 8f2a62f811562b4008dd1cd50a0ebf5603b13a76 /fs/read_write.c | |
parent | b175293ccc98ab84e93d25472d7422b4a897614b (diff) | |
parent | e8cd81693bbbb15db57d3c9aa7dd90eda4842874 (diff) | |
download | linux-de55eb1d60d2ed0f1ba5e13226d91b3bfbe1c108.tar.xz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"stable fodder; assorted deadlock fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
vt: synchronize_rcu() under spinlock is not nice...
Nest rename_lock inside vfsmount_lock
Don't bother with redoing rw_verify_area() from default_file_splice_from()
Diffstat (limited to 'fs/read_write.c')
-rw-r--r-- | fs/read_write.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index a698eff457fb..f7b5a23b804b 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -17,6 +17,7 @@ #include <linux/splice.h> #include <linux/compat.h> #include "read_write.h" +#include "internal.h" #include <asm/uaccess.h> #include <asm/unistd.h> @@ -417,6 +418,30 @@ ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, lof EXPORT_SYMBOL(do_sync_write); +ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t *pos) +{ + mm_segment_t old_fs; + const char __user *p; + ssize_t ret; + + old_fs = get_fs(); + set_fs(get_ds()); + p = (__force const char __user *)buf; + if (count > MAX_RW_COUNT) + count = MAX_RW_COUNT; + if (file->f_op->write) + ret = file->f_op->write(file, p, count, pos); + else + ret = do_sync_write(file, p, count, pos); + set_fs(old_fs); + if (ret > 0) { + fsnotify_modify(file); + add_wchar(current, ret); + } + inc_syscw(current); + return ret; +} + ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos) { ssize_t ret; |