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| author | Al Viro <viro@zeniv.linux.org.uk> | 2013-03-20 18:19:30 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-03-21 18:11:11 +0100 |
| commit | 06ae43f34bcc07a0b6be8bf78a1c895bcd12c839 (patch) | |
| tree | b74fe0c7e9370dfed956a1607dd10282c9ba1096 /fs/internal.h | |
| parent | Linux 3.9-rc2 (diff) | |
| download | linux-06ae43f34bcc07a0b6be8bf78a1c895bcd12c839.tar.xz linux-06ae43f34bcc07a0b6be8bf78a1c895bcd12c839.zip | |
Don't bother with redoing rw_verify_area() from default_file_splice_from()
default_file_splice_from() ends up calling vfs_write() (via very convoluted
callchain). It's an overkill, since we already have done rw_verify_area()
in the caller by the time we call vfs_write() we are under set_fs(KERNEL_DS),
so access_ok() is also pointless. Add a new helper (__kernel_write()),
use it instead of kernel_write() in there.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/internal.h')
| -rw-r--r-- | fs/internal.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/internal.h b/fs/internal.h index 507141fceb99..4be78237d896 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -125,3 +125,8 @@ extern int invalidate_inodes(struct super_block *, bool); * dcache.c */ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); + +/* + * read_write.c + */ +extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *); |