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authorDavid Gibson <david@gibson.dropbear.id.au>2005-11-07 00:59:33 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:38 -0800
commit796f8d9b98fc92a5e9aaea8cf932957850332f51 (patch)
tree66e0a2bdf18e03c7dadba7c4c7b896533aa2e762 /drivers/video
parentd55b5fdaf40846221d543937b786956e27837fda (diff)
[PATCH] FUTEX_WAKE_OP: enhanced error handling
The code for FUTEX_WAKE_OP calls an arch callback, futex_atomic_op_inuser(). That callback can return an error code, but currently the caller assumes any error is EFAULT, and will try various things to resolve the fault before eventually giving up with EFAULT (regardless of the original error code). This is not a theoretical case - arch callbacks currently return -ENOSYS if the opcode they are given is bogus. This patch alters the code to detect non-EFAULT errors and return them directly to the user. Of course, whether -ENOSYS is the correct return value for the bogus opcode case, or whether EINVAL would be more appropriate is another question. Signed-off-by: David Gibson <dwg@au1.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jamie Lokier <jamie@shareable.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video')
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