thread_info: factor out restart_block
authorMark Rutland <mark.rutland@arm.com>
Wed, 19 Oct 2016 18:28:12 +0000 (19:28 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 11 Nov 2016 18:24:16 +0000 (18:24 +0000)
commit53d74d056a4e306a72b8883d325b5d853c0618e6
tree54e53e9bcf3760d91500ff5540b0fc37302904de
parent094339443e6e247254a275ec5e5d8418ad1b2d25
thread_info: factor out restart_block

Since commit f56141e3e2d9aabf ("all arches, signal: move restart_block
to struct task_struct"), thread_info and restart_block have been
logically distinct, yet struct restart_block is still defined in
<linux/thread_info.h>.

At least one architecture (erroneously) uses restart_block as part of
its thread_info, and thus the definition of restart_block must come
before the include of <asm/thread_info>. Subsequent patches in this
series need to shuffle the order of includes and definitions in
<linux/thread_info.h>, and will make this ordering fragile.

This patch moves the definition of restart_block out to its own header.
This serves as generic cleanup, logically separating thread_info and
restart_block, and also makes it easier to avoid fragility.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
include/linux/restart_block.h [new file with mode: 0644]
include/linux/thread_info.h