diff options
| author | Arun Sharma <arun.sharma@intel.com> | 2004-08-26 20:43:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-08-26 20:43:14 -0700 |
| commit | ce18373907856aedaa6251ff3cdd1340ee4af29a (patch) | |
| tree | f6067623ca7a61bc55b122b90c90d147732e5615 /include/asm-ppc64 | |
| parent | fec18575fbb0faf522afbf5b5288962a79ed542f (diff) | |
[PATCH] Fix copying of unaligned data across user/kernel boundary
32 bit compatibility code sometimes needs to copy unaligned data across
kernel/user boundary and currently there is no architecture independent API
to do it.
(1) Introduce new APIs __{get,put}_user_unaligned. These APIs are
necessary because the optimal way to copy unaligned data across
kernel/user boundary is different on different architectures.
Some architectures don't even care about alignment.
On some __put_user is faster than __copy_to_user for small sizes.
(2) Optimize __{get,put}_user_unaligned for ia64, x86-64, s390, ppc64.
(3) Fix compat_filldir64() which is broken on big-endian machines
Thanks to Arnd Bergmann <arnd@arndb.de> for his help.
Signed-off-by: Gordon Jin <gordon.jin@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-ppc64')
| -rw-r--r-- | include/asm-ppc64/uaccess.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-ppc64/uaccess.h b/include/asm-ppc64/uaccess.h index 16dbcb999335..58eec5324170 100644 --- a/include/asm-ppc64/uaccess.h +++ b/include/asm-ppc64/uaccess.h @@ -111,6 +111,9 @@ extern unsigned long search_exception_table(unsigned long); #define __put_user(x,ptr) \ __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr))) +#define __get_user_unaligned __get_user +#define __put_user_unaligned __put_user + extern long __put_user_bad(void); #define __put_user_nocheck(x,ptr,size) \ |