diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/h8300/include/asm/cmpxchg.h | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/h8300/include/asm/cmpxchg.h')
-rw-r--r-- | kernel/arch/h8300/include/asm/cmpxchg.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/kernel/arch/h8300/include/asm/cmpxchg.h b/kernel/arch/h8300/include/asm/cmpxchg.h new file mode 100644 index 000000000..95fec4cd1 --- /dev/null +++ b/kernel/arch/h8300/include/asm/cmpxchg.h @@ -0,0 +1,65 @@ +#ifndef __ARCH_H8300_CMPXCHG__ +#define __ARCH_H8300_CMPXCHG__ + +#include <linux/irqflags.h> + +#define xchg(ptr, x) \ + ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), \ + sizeof(*(ptr)))) + +struct __xchg_dummy { unsigned long a[100]; }; +#define __xg(x) ((volatile struct __xchg_dummy *)(x)) + +static inline unsigned long __xchg(unsigned long x, + volatile void *ptr, int size) +{ + unsigned long tmp, flags; + + local_irq_save(flags); + + switch (size) { + case 1: + __asm__ __volatile__ + ("mov.b %2,%0\n\t" + "mov.b %1,%2" + : "=&r" (tmp) : "r" (x), "m" (*__xg(ptr))); + break; + case 2: + __asm__ __volatile__ + ("mov.w %2,%0\n\t" + "mov.w %1,%2" + : "=&r" (tmp) : "r" (x), "m" (*__xg(ptr))); + break; + case 4: + __asm__ __volatile__ + ("mov.l %2,%0\n\t" + "mov.l %1,%2" + : "=&r" (tmp) : "r" (x), "m" (*__xg(ptr))); + break; + default: + tmp = 0; + } + local_irq_restore(flags); + return tmp; +} + +#include <asm-generic/cmpxchg-local.h> + +/* + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make + * them available. + */ +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \ + (unsigned long)(o), \ + (unsigned long)(n), \ + sizeof(*(ptr)))) +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) + +#ifndef CONFIG_SMP +#include <asm-generic/cmpxchg.h> +#endif + +#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) + +#endif /* __ARCH_H8300_CMPXCHG__ */ |