diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2017-07-05 19:59:05 +0300 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-07-11 15:35:12 +0300 |
| commit | d40e0d4fb5613099a58c95a9403f51b03e40e861 (patch) | |
| tree | 6003ccc43fd05bcdbff3bb377041dadceff8fcfd | |
| parent | e5f5a5b06e51a36f6ddf31a4a485358263953a3d (diff) | |
| download | linux-d40e0d4fb5613099a58c95a9403f51b03e40e861.tar.xz | |
locking/qspinlock: Include linux/prefetch.h
kernel/locking/qspinlock.c makes use of prefetchw() but hasn't included
linux/prefetch.h up until now, instead relying upon indirect inclusion
of some header that defines prefetchw().
In the case of MIPS we generally obtain a definition of prefetchw() from
asm/processor.h, included by way of linux/mutex.h, but only for
configurations which select CONFIG_CPU_HAS_PREFETCH. For configurations
which don't this leaves prefetchw() undefined leading to the following
build failure:
CC kernel/locking/qspinlock.o
kernel/locking/qspinlock.c: In function ‘queued_spin_lock_slowpath’:
kernel/locking/qspinlock.c:549:4: error: implicit declaration of
function ‘prefetchw’ [-Werror=implicit-function-declaration]
prefetchw(next);
^~~~~~~~~
Fix this by including linux/prefetch.h in order to ensure that we get a
definition of prefetchw().
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | kernel/locking/qspinlock.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index b2caec7315af..fd24153e8a48 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -28,6 +28,7 @@ #include <linux/percpu.h> #include <linux/hardirq.h> #include <linux/mutex.h> +#include <linux/prefetch.h> #include <asm/byteorder.h> #include <asm/qspinlock.h> |