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| author | Vadim Lobanov <vlobanov@speakeasy.net> | 2006-07-14 00:24:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-14 21:53:52 -0700 |
| commit | 8477b55ba11a49515b26573a90414b718179c908 (patch) | |
| tree | 6a7f5f4c48242f071ae86e5a8c947bf905116d5b /arch/i386/lib/usercopy.c | |
| parent | e78a887a5942d06c81ccf0793fbf2bd83e982122 (diff) | |
| download | op-kernel-dev-8477b55ba11a49515b26573a90414b718179c908.zip op-kernel-dev-8477b55ba11a49515b26573a90414b718179c908.tar.gz | |
[PATCH] i386: remove redundant might_sleep() in user accessors.
On i386, the user space accessor functions copy_from/to_user() both invoke
might_sleep(), do a quick sanity check, and then pass the work on to their
__copy_from/to_user() counterparts, which again invoke might_sleep().
Given that no actual work happens between these two calls, it is best to
eliminate one of the redundant might_sleep()s.
Signed-off-by: Vadim Lobanov <vlobanov@speakeasy.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/lib/usercopy.c')
| -rw-r--r-- | arch/i386/lib/usercopy.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/i386/lib/usercopy.c b/arch/i386/lib/usercopy.c index 4b75212..efc7e7d 100644 --- a/arch/i386/lib/usercopy.c +++ b/arch/i386/lib/usercopy.c @@ -843,7 +843,6 @@ unsigned long __copy_from_user_ll_nocache_nozero(void *to, const void __user *fr unsigned long copy_to_user(void __user *to, const void *from, unsigned long n) { - might_sleep(); BUG_ON((long) n < 0); if (access_ok(VERIFY_WRITE, to, n)) n = __copy_to_user(to, from, n); @@ -870,7 +869,6 @@ EXPORT_SYMBOL(copy_to_user); unsigned long copy_from_user(void *to, const void __user *from, unsigned long n) { - might_sleep(); BUG_ON((long) n < 0); if (access_ok(VERIFY_READ, from, n)) n = __copy_from_user(to, from, n); |
