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069923d87e
On sparc64 compat-enabled kernels, any task can make 32-bit and 64-bit syscalls. is_compat_task returns true in 32-bit tasks, which does not necessarily imply that the current syscall is 32-bit. Provide an in_compat_syscall implementation that checks whether the current syscall is compat. As far as I know, sparc is the only architecture on which is_compat_task checks the compat status of the task and on which the compat status of a syscall can differ from the compat status of the task. On x86, is_compat_task checks the syscall type, not the task type. [akpm@linux-foundation.org: add comment, per Sam] [akpm@linux-foundation.org: update comment, per Andy] Signed-off-by: Andy Lutomirski <luto@kernel.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Andy Lutomirski <luto@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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