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author | Ingo Molnar <mingo@elte.hu> | 2011-04-27 08:38:30 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2011-04-27 08:40:21 (GMT) |
commit | 32673822e440eb92eb334631eb0a199d0c532d13 (patch) | |
tree | c1e55c1793fa17937d9b8e0a9a2946583f1948d5 /arch/s390/include | |
parent | fa7b69475a6c192853949ba496dd9c37b497b548 (diff) | |
parent | 5373db886b791b2bc7811e2c115377916c409a5d (diff) | |
download | linux-32673822e440eb92eb334631eb0a199d0c532d13.tar.xz |
Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
Conflicts:
include/linux/perf_event.h
Merge reason: pick up the latest jump-label enhancements, they are cooked ready.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/s390/include')
-rw-r--r-- | arch/s390/include/asm/jump_label.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/s390/include/asm/jump_label.h b/arch/s390/include/asm/jump_label.h new file mode 100644 index 0000000..95a6cf2 --- /dev/null +++ b/arch/s390/include/asm/jump_label.h @@ -0,0 +1,37 @@ +#ifndef _ASM_S390_JUMP_LABEL_H +#define _ASM_S390_JUMP_LABEL_H + +#include <linux/types.h> + +#define JUMP_LABEL_NOP_SIZE 6 + +#ifdef CONFIG_64BIT +#define ASM_PTR ".quad" +#define ASM_ALIGN ".balign 8" +#else +#define ASM_PTR ".long" +#define ASM_ALIGN ".balign 4" +#endif + +static __always_inline bool arch_static_branch(struct jump_label_key *key) +{ + asm goto("0: brcl 0,0\n" + ".pushsection __jump_table, \"aw\"\n" + ASM_ALIGN "\n" + ASM_PTR " 0b, %l[label], %0\n" + ".popsection\n" + : : "X" (key) : : label); + return false; +label: + return true; +} + +typedef unsigned long jump_label_t; + +struct jump_entry { + jump_label_t code; + jump_label_t target; + jump_label_t key; +}; + +#endif |