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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2006-10-01 10:27:45 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 11:39:22 +0400
commit3c1fcfe229e99752c74efb945a4a3f560be04204 (patch)
tree44085d9b599e06a92426141811a6f712beac17aa /include/asm-s390/setup.h
parentcdc39363d33506b0e067d41fc91f89d186bdf7f7 (diff)
downloadlinux-3c1fcfe229e99752c74efb945a4a3f560be04204.tar.xz
[PATCH] Directed yield: direct yield of spinlocks for s390.
Use the new diagnose 0x9c in the spinlock implementation for s390. It yields the remaining timeslice of the virtual cpu that tries to acquire a lock to the virtual cpu that is the current holder of the lock. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-s390/setup.h')
-rw-r--r--include/asm-s390/setup.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index f1959732b6fd..5d72eda8a11b 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -39,6 +39,7 @@ extern unsigned long machine_flags;
#define MACHINE_IS_P390 (machine_flags & 4)
#define MACHINE_HAS_MVPG (machine_flags & 16)
#define MACHINE_HAS_IDTE (machine_flags & 128)
+#define MACHINE_HAS_DIAG9C (machine_flags & 256)
#ifndef __s390x__
#define MACHINE_HAS_IEEE (machine_flags & 2)