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perf: Make bp_len type to u64 generic across the arch

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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>
This commit is contained in:
Mahesh Salgaonkar 2010-01-30 10:25:18 +05:30 committed by Frederic Weisbecker
parent c80d292f13
commit cd757645fb
4 changed files with 5 additions and 7 deletions
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2
include/linux/hw_breakpoint.h
View file

@ -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;
}

6
include/linux/perf_event.h
View file

@ -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;
};
/*

2
kernel/hw_breakpoint.c
View file

@ -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);

2
kernel/perf_event.c
View file

@ -4580,7 +4580,7 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
if (attr->type >= PERF_TYPE_MAX)
return -EINVAL;
if (attr->__reserved_1 || attr->__reserved_2)
if (attr->__reserved_1)
return -EINVAL;
if (attr->sample_type & ~(PERF_SAMPLE_MAX-1))