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authorMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>2010-01-30 07:55:18 +0300
committerFrederic Weisbecker <fweisbec@gmail.com>2010-02-04 03:07:12 +0300
commitcd757645fbdc34a8343c04bb0e74e06fccc2cb10 (patch)
treeb06a5b92674731846b4d22aa53c99d6099b304b7 /kernel/hw_breakpoint.c
parentc80d292f137275a1ed88e6ed515ecb457051f1a4 (diff)
downloadlinux-cd757645fbdc34a8343c04bb0e74e06fccc2cb10.tar.xz
perf: Make bp_len type to u64 generic across the arch
Change 'bp_len' type to __u64 to make it work across archs as the s390 architecture watch point length can be upto 2^64. reference: http://lkml.org/lkml/2010/1/25/212 This is an ABI change that is not backward compatible with the previous hardware breakpoint info layout integrated in this development cycle, a rebuilt of perf tools is necessary for versions based on 2.6.33-rc1 - 2.6.33-rc6 to work with a kernel based on this patch. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: "K. Prasad" <prasad@linux.vnet.ibm.com> Cc: Maneesh Soni <maneesh@in.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin <schwidefsky@de.ibm.com> LKML-Reference: <20100130045518.GA20776@in.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'kernel/hw_breakpoint.c')
-rw-r--r--kernel/hw_breakpoint.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c
index 8a5c7d55ac9f..967e66143e11 100644
--- a/kernel/hw_breakpoint.c
+++ b/kernel/hw_breakpoint.c
@@ -360,8 +360,8 @@ EXPORT_SYMBOL_GPL(register_user_hw_breakpoint);
int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr)
{
u64 old_addr = bp->attr.bp_addr;
+ u64 old_len = bp->attr.bp_len;
int old_type = bp->attr.bp_type;
- int old_len = bp->attr.bp_len;
int err = 0;
perf_event_disable(bp);