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>

2 files changed, 3 insertions, 5 deletions

diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h
index 070ba0621738..5977b724f7c6 100644
--- a/include/linux/hw_breakpoint.h
+++ b/include/linux/hw_breakpoint.h
@@ -44,7 +44,7 @@ static inline int hw_breakpoint_type(struct perf_event *bp)
         return bp->attr.bp_type;
 }
 
-static inline int hw_breakpoint_len(struct perf_event *bp)
+static inline unsigned long hw_breakpoint_len(struct perf_event *bp)
 {
         return bp->attr.bp_len;
 }
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 8fa71874113f..a177698d95e2 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -211,11 +211,9 @@ struct perf_event_attr {
                 __u32           wakeup_watermark; /* bytes before wakeup   */
         };
 
-        __u32                   __reserved_2;
-
-        __u64                   bp_addr;
         __u32                   bp_type;
-        __u32                   bp_len;
+        __u64                   bp_addr;
+        __u64                   bp_len;
 };
 
 /*