path: root/kernel/fork.c
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authorArnd Bergmann <arnd@arndb.de>2016-03-22 14:27:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 15:36:02 -0700
commitade356b99a4187578609f2a91c4d2ed88e4e70dc (patch)
treec1e5afa33f44a16c1e90d1e8aff293994ace266a /kernel/fork.c
parentabc514c58059ca6f02df41798e828ffd864f1d21 (diff)
profile: hide unused functions when !CONFIG_PROC_FS
A couple of functions and variables in the profile implementation are used only on SMP systems by the procfs code, but are unused if either procfs is disabled or in uniprocessor kernels. gcc prints a harmless warning about the unused symbols: kernel/profile.c:243:13: error: 'profile_flip_buffers' defined but not used [-Werror=unused-function] static void profile_flip_buffers(void) ^ kernel/profile.c:266:13: error: 'profile_discard_flip_buffers' defined but not used [-Werror=unused-function] static void profile_discard_flip_buffers(void) ^ kernel/profile.c:330:12: error: 'profile_cpu_callback' defined but not used [-Werror=unused-function] static int profile_cpu_callback(struct notifier_block *info, ^ This adds further #ifdef to the file, to annotate exactly in which cases they are used. I have done several thousand ARM randconfig kernels with this patch applied and no longer get any warnings in this file. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Robin Holt <robinmholt@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Christoph Lameter <cl@linux.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
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