user/sven/linux.git/include/asm-generic/uaccess.h, branch v3.10.97

asm-generic: uaccess: Allow arches to over-ride __{get,put}_user_fn()

2013-02-11T14:30:32Z

As of now these default to calling the arch provided __copy_{to,from}_user() routines which being general purpose (w.r.t buffer alignment and lengths) would lead to alignment checks in generated code (for arches which don't support unaligned load/stores). Given that in this case we already know that data involved is "unit" sized and aligned, using the vanilla copy backend is a bit wasteful. This change thus allows arches to over-ride the aforementioned routines. Signed-off-by: Vineet Gupta Acked-by: Arnd Bergmann

asm-generic headers: uaccess.h to conditionally define segment_eq()

2013-02-11T14:30:31Z

This is because mm_segment_t is exported by arch code, while seqment_eq assumes it will have .seg element. Acked-by: Arnd Bergmann Signed-off-by: Vineet Gupta

fix default __strnlen_user macro

2011-10-06T23:47:12Z

The existing __strnlen_user macro simply resolved to strnlen. However, the count returned by strnlen_user should include the NULL byte. This patch fixes the __strnlen_user macro to include the NULL byte in the count. Signed-off-by: Mark Salter Acked-by: Arnd Bergmann

asm-generic headers: add arch-specific __strnlen_user calling in uaccess.h

2011-03-17T01:19:05Z

This patch changes the implementation of strnlen_user in include/asm-generic/uaccess.h. Originally, it calls strlen() function directly, which may not correctly handle the access of user space in most mmu-enabled architectures. New __strnlen_user is added for using as an architecture specific function. Signed-off-by: Guan Xuetao Reviewed-by: Arnd Bergmann

asm-generic: uaccess: fix up local access_ok() usage

2009-06-19T12:58:08Z

There's no reason that I can see to use the short __access_ok() form directly when the access_ok() is clearer in intent and for most people, expands to the same C code (i.e. always specify the first field -- access type). Not all no-mmu systems lack memory protection, so the read/write could feasibly be checked. Signed-off-by: Mike Frysinger Signed-off-by: Arnd Bergmann

asm-generic: uaccess: add missing access_ok() check to strnlen_user()

2009-06-19T12:58:07Z

The strnlen_user() function was missing a access_ok() check on the pointer given. We've had cases on Blackfin systems where test programs caused kernel crashes here because userspace passed up a NULL/-1 pointer and the kernel gladly attempted to run strlen() on it. Signed-off-by: Mike Frysinger Signed-off-by: Arnd Bergmann

asm-generic: add a generic uaccess.h

2009-06-11T19:02:50Z

Based on discussions with Michal Simek and code from m68knommu and h8300, this version of uaccess.h should be usable by most architectures, by overriding some parts of it. Simple NOMMU architectures can use it out of the box, but a minimal __access_ok() should be added there as well. Cc: Michal Simek Signed-off-by: Arnd Bergmann

asm-generic: rename page.h and uaccess.h

2009-06-11T19:02:17Z

The current asm-generic/page.h only contains the get_order function, and asm-generic/uaccess.h only implements unaligned accesses. This renames the file to getorder.h and uaccess-unaligned.h to make room for new page.h and uaccess.h file that will be usable by all simple (e.g. nommu) architectures. Signed-off-by: Remis Lima Baima Signed-off-by: Arnd Bergmann

[UACCESS]: Fix typo in generic __get_user_unaligned().

2004-08-27T06:45:44Z

Signed-off-by: David S. Miller

[PATCH] Fix copying of unaligned data across user/kernel boundary

2004-08-27T03:43:14Z

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 for his help. Signed-off-by: Gordon Jin Signed-off-by: Arun Sharma Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds