Commit-ID: 36748b9518a2437beffe861b47dff6d12b736b3f
Gitweb: http://git.kernel.org/tip/36748b9518a2437beffe861b47dff6d12b736b3f
Author: Jacob Shin <jacob.w.shin@xxxxxxxxx>
AuthorDate: Thu, 29 May 2014 17:26:53 +0200
Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx>
CommitDate: Wed, 3 Dec 2014 15:14:30 +0100
perf/x86: Remove get_hbp_len and replace with bp_len
Clean up the logic for determining the breakpoint length
Signed-off-by: Jacob Shin <jacob.w.shin@xxxxxxxxx>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Reviewed-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: xiakaixu <xiakaixu@xxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
arch/x86/kernel/hw_breakpoint.c | 25 +------------------------
1 file changed, 1 insertion(+), 24 deletions(-)
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index b5cb0c5..7114ba2 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -167,29 +167,6 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
set_dr_addr_mask(0, i);
}
-static int get_hbp_len(u8 hbp_len)
-{
- unsigned int len_in_bytes = 0;
-
- switch (hbp_len) {
- case X86_BREAKPOINT_LEN_1:
- len_in_bytes = 1;
- break;
- case X86_BREAKPOINT_LEN_2:
- len_in_bytes = 2;
- break;
- case X86_BREAKPOINT_LEN_4:
- len_in_bytes = 4;
- break;
-#ifdef CONFIG_X86_64
- case X86_BREAKPOINT_LEN_8:
- len_in_bytes = 8;
- break;
-#endif
- }
- return len_in_bytes;
-}
-
/*
* Check for virtual address in kernel space.
*/
@@ -200,7 +177,7 @@ int arch_check_bp_in_kernelspace(struct perf_event *bp)
struct arch_hw_breakpoint *info = counter_arch_bp(bp);
va = info->address;
- len = get_hbp_len(info->len);
+ len = bp->attr.bp_len;
return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
}
--
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