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| author | Rik van Riel <riel@redhat.com> | 2014-09-30 21:59:47 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-10-03 05:46:55 +0200 |
| commit | 347abad981c1ef815ea5ba861adba6a8c6aa1580 (patch) | |
| tree | ea18690dcb71d23c29a92a602c1d5373f9360e7a /include/asm-generic | |
| parent | sched: Improve sysbench performance by fixing spurious active migration (diff) | |
| download | linux-347abad981c1ef815ea5ba861adba6a8c6aa1580.tar.xz linux-347abad981c1ef815ea5ba861adba6a8c6aa1580.zip | |
sched, time: Fix build error with 64 bit cputime_t on 32 bit systems
On 32 bit systems cmpxchg cannot handle 64 bit values, so
some additional magic is required to allow a 32 bit system
with CONFIG_VIRT_CPU_ACCOUNTING_GEN=y enabled to build.
Make sure the correct cmpxchg function is used when doing
an atomic swap of a cputime_t.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rik van Riel <riel@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: umgwanakikbuti@gmail.com
Cc: fweisbec@gmail.com
Cc: srao@redhat.com
Cc: lwoodman@redhat.com
Cc: atheurer@redhat.com
Cc: oleg@redhat.com
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux390@de.ibm.com
Cc: linux-arch@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Link: http://lkml.kernel.org/r/20140930155947.070cdb1f@annuminas.surriel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/cputime_jiffies.h | 2 | ||||
| -rw-r--r-- | include/asm-generic/cputime_nsecs.h | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-generic/cputime_jiffies.h b/include/asm-generic/cputime_jiffies.h index d5cb78f53986..fe386fc6e85e 100644 --- a/include/asm-generic/cputime_jiffies.h +++ b/include/asm-generic/cputime_jiffies.h @@ -3,6 +3,8 @@ typedef unsigned long __nocast cputime_t; +#define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new) + #define cputime_one_jiffy jiffies_to_cputime(1) #define cputime_to_jiffies(__ct) (__force unsigned long)(__ct) #define cputime_to_scaled(__ct) (__ct) diff --git a/include/asm-generic/cputime_nsecs.h b/include/asm-generic/cputime_nsecs.h index 4e817606c549..0419485891f2 100644 --- a/include/asm-generic/cputime_nsecs.h +++ b/include/asm-generic/cputime_nsecs.h @@ -21,6 +21,8 @@ typedef u64 __nocast cputime_t; typedef u64 __nocast cputime64_t; +#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new) + #define cputime_one_jiffy jiffies_to_cputime(1) #define cputime_div(__ct, divisor) div_u64((__force u64)__ct, divisor) |