mutex: replace CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX with simple ifdef
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Sat, 28 Sep 2013 09:23:59 +0000 (11:23 +0200)
committerHeiko Carstens <heiko.carstens@de.ibm.com>
Sat, 28 Sep 2013 10:46:21 +0000 (12:46 +0200)
commit083986e8248d978b6c961d3da6beb0c921c68220
tree1a760afa3f006b21d2464a226c2792dc59ab845d
parent6cac446bd37d9381815fe4c2b0e7b1fd1085000c
mutex: replace CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX with simple ifdef

Linus suggested to replace

 #ifndef CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX
 #define arch_mutex_cpu_relax() cpu_relax()
 #endif

with just a simple

  #ifndef arch_mutex_cpu_relax
  # define arch_mutex_cpu_relax() cpu_relax()
  #endif

to get rid of CONFIG_HAVE_CPU_RELAX_SIMPLE. So architectures can
simply define arch_mutex_cpu_relax if they want an architecture
specific function instead of having to add a select statement in
their Kconfig in addition.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
arch/Kconfig
arch/s390/Kconfig
arch/s390/include/asm/mutex.h
arch/s390/include/asm/processor.h
include/linux/mutex.h