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authorAl Viro <viro@zeniv.linux.org.uk>2011-11-20 17:23:39 -0500
committerRichard Weinberger <richard@nod.at>2012-03-25 00:29:55 +0100
commitc56334dbf7e8772ed84390bc4664427f0a7f3b25 (patch)
tree7deaf851c0baa7bab6eb9446093833e81f57683a /arch/x86/um/asm/processor.h
parent10c890c0a303070652f5374ea31a0b29350d14d9 (diff)
downloadop-kernel-dev-c56334dbf7e8772ed84390bc4664427f0a7f3b25.zip
op-kernel-dev-c56334dbf7e8772ed84390bc4664427f0a7f3b25.tar.gz
um: merge processor_{32,64}.h a bit...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/x86/um/asm/processor.h')
-rw-r--r--arch/x86/um/asm/processor.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/um/asm/processor.h b/arch/x86/um/asm/processor.h
index 2c32df6..04f82e0 100644
--- a/arch/x86/um/asm/processor.h
+++ b/arch/x86/um/asm/processor.h
@@ -17,6 +17,16 @@
#define ARCH_IS_STACKGROW(address) \
(address + 65536 + 32 * sizeof(unsigned long) >= UPT_SP(&current->thread.regs.regs))
+#include <asm/user.h>
+
+/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+static inline void rep_nop(void)
+{
+ __asm__ __volatile__("rep;nop": : :"memory");
+}
+
+#define cpu_relax() rep_nop()
+
#include <asm/processor-generic.h>
#endif
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