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Date: Mon, 10 May 2010 17:25:59 +0800
From: Lin Ming <ming.m.lin@...el.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>
Cc: Frederic Weisbecker <fweisbec@...il.com>,
"eranian@...il.com" <eranian@...il.com>,
"Gary.Mohr@...l.com" <Gary.Mohr@...l.com>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
Paul Mackerras <paulus@...ba.org>,
"David S. Miller" <davem@...emloft.net>,
Russell King <rmk+kernel@....linux.org.uk>,
Paul Mundt <lethal@...ux-sh.org>,
lkml <linux-kernel@...r.kernel.org>
Subject: [RFC][PATCH 1/9] perf: un-const struct pmu *
A new field "id" will be added to struct pmu, and the "id" is assigned
at registration time, so the struct is not const any more.
Signed-off-by: Lin Ming <ming.m.lin@...el.com>
---
arch/arm/kernel/perf_event.c | 2 +-
arch/powerpc/kernel/perf_event.c | 2 +-
arch/powerpc/kernel/perf_event_fsl_emb.c | 2 +-
arch/sh/kernel/perf_event.c | 4 ++--
arch/sparc/kernel/perf_event.c | 4 ++--
arch/x86/kernel/cpu/perf_event.c | 14 +++++++-------
include/linux/perf_event.h | 10 +++++-----
kernel/perf_event.c | 24 ++++++++++++------------
8 files changed, 31 insertions(+), 31 deletions(-)
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 9e70f20..8400ddf 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -446,7 +446,7 @@ __hw_perf_event_init(struct perf_event *event)
return err;
}
-const struct pmu *
+struct pmu *
hw_perf_event_init(struct perf_event *event)
{
int err = 0;
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index 08460a2..e02f2ee 100644
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -1003,7 +1003,7 @@ static int hw_perf_cache_event(u64 config, u64 *eventp)
return 0;
}
-const struct pmu *hw_perf_event_init(struct perf_event *event)
+struct pmu *hw_perf_event_init(struct perf_event *event)
{
u64 ev;
unsigned long flags;
diff --git a/arch/powerpc/kernel/perf_event_fsl_emb.c b/arch/powerpc/kernel/perf_event_fsl_emb.c
index 369872f..cf8554e 100644
--- a/arch/powerpc/kernel/perf_event_fsl_emb.c
+++ b/arch/powerpc/kernel/perf_event_fsl_emb.c
@@ -428,7 +428,7 @@ static int hw_perf_cache_event(u64 config, u64 *eventp)
return 0;
}
-const struct pmu *hw_perf_event_init(struct perf_event *event)
+struct pmu *hw_perf_event_init(struct perf_event *event)
{
u64 ev;
struct perf_event *events[MAX_HWEVENTS];
diff --git a/arch/sh/kernel/perf_event.c b/arch/sh/kernel/perf_event.c
index 81b6de4..6e3a95f 100644
--- a/arch/sh/kernel/perf_event.c
+++ b/arch/sh/kernel/perf_event.c
@@ -257,13 +257,13 @@ static void sh_pmu_read(struct perf_event *event)
sh_perf_event_update(event, &event->hw, event->hw.idx);
}
-static const struct pmu pmu = {
+static struct pmu pmu = {
.enable = sh_pmu_enable,
.disable = sh_pmu_disable,
.read = sh_pmu_read,
};
-const struct pmu *hw_perf_event_init(struct perf_event *event)
+struct pmu *hw_perf_event_init(struct perf_event *event)
{
int err = __hw_perf_event_init(event);
if (unlikely(err)) {
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index e277193..a163f55 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1128,14 +1128,14 @@ static int __hw_perf_event_init(struct perf_event *event)
return 0;
}
-static const struct pmu pmu = {
+static struct pmu pmu = {
.enable = sparc_pmu_enable,
.disable = sparc_pmu_disable,
.read = sparc_pmu_read,
.unthrottle = sparc_pmu_unthrottle,
};
-const struct pmu *hw_perf_event_init(struct perf_event *event)
+struct pmu *hw_perf_event_init(struct perf_event *event)
{
int err = __hw_perf_event_init(event);
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index fd4db0d..5c6a0d9 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -616,7 +616,7 @@ static void x86_pmu_enable_all(int added)
}
}
-static const struct pmu pmu;
+static struct pmu pmu;
static inline int is_x86_event(struct perf_event *event)
{
@@ -1374,7 +1374,7 @@ static inline void x86_pmu_read(struct perf_event *event)
* Set the flag to make pmu::enable() not perform the
* schedulability test, it will be performed at commit time
*/
-static void x86_pmu_start_txn(const struct pmu *pmu)
+static void x86_pmu_start_txn(struct pmu *pmu)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
@@ -1386,7 +1386,7 @@ static void x86_pmu_start_txn(const struct pmu *pmu)
* Clear the flag and pmu::enable() will perform the
* schedulability test.
*/
-static void x86_pmu_cancel_txn(const struct pmu *pmu)
+static void x86_pmu_cancel_txn(struct pmu *pmu)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
@@ -1398,7 +1398,7 @@ static void x86_pmu_cancel_txn(const struct pmu *pmu)
* Perform the group schedulability test as a whole
* Return 0 if success
*/
-static int x86_pmu_commit_txn(const struct pmu *pmu)
+static int x86_pmu_commit_txn(struct pmu *pmu)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
int assign[X86_PMC_IDX_MAX];
@@ -1422,7 +1422,7 @@ static int x86_pmu_commit_txn(const struct pmu *pmu)
return 0;
}
-static const struct pmu pmu = {
+static struct pmu pmu = {
.enable = x86_pmu_enable,
.disable = x86_pmu_disable,
.start = x86_pmu_start,
@@ -1508,9 +1508,9 @@ out:
return ret;
}
-const struct pmu *hw_perf_event_init(struct perf_event *event)
+struct pmu *hw_perf_event_init(struct perf_event *event)
{
- const struct pmu *tmp;
+ struct pmu *tmp;
int err;
err = __hw_perf_event_init(event);
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 4924c96..5856d3b 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -566,9 +566,9 @@ struct pmu {
* If test fails, roll back the whole group
*/
- void (*start_txn) (const struct pmu *pmu);
- void (*cancel_txn) (const struct pmu *pmu);
- int (*commit_txn) (const struct pmu *pmu);
+ void (*start_txn) (struct pmu *pmu);
+ void (*cancel_txn) (struct pmu *pmu);
+ int (*commit_txn) (struct pmu *pmu);
};
/**
@@ -646,7 +646,7 @@ struct perf_event {
int group_flags;
struct perf_event *group_leader;
struct perf_event *output;
- const struct pmu *pmu;
+ struct pmu *pmu;
enum perf_event_active_state state;
atomic64_t count;
@@ -818,7 +818,7 @@ struct perf_output_handle {
*/
extern int perf_max_events;
-extern const struct pmu *hw_perf_event_init(struct perf_event *event);
+extern struct pmu *hw_perf_event_init(struct perf_event *event);
extern void perf_event_task_sched_in(struct task_struct *task);
extern void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 180151f..36baf85 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -75,7 +75,7 @@ static DEFINE_SPINLOCK(perf_resource_lock);
/*
* Architecture provided APIs - weak aliases:
*/
-extern __weak const struct pmu *hw_perf_event_init(struct perf_event *event)
+extern __weak struct pmu *hw_perf_event_init(struct perf_event *event)
{
return NULL;
}
@@ -637,7 +637,7 @@ group_sched_in(struct perf_event *group_event,
struct perf_event_context *ctx)
{
struct perf_event *event, *partial_group = NULL;
- const struct pmu *pmu = group_event->pmu;
+ struct pmu *pmu = group_event->pmu;
bool txn = false;
int ret;
@@ -4184,7 +4184,7 @@ static void perf_swevent_disable(struct perf_event *event)
hlist_del_rcu(&event->hlist_entry);
}
-static const struct pmu perf_ops_generic = {
+static struct pmu perf_ops_generic = {
.enable = perf_swevent_enable,
.disable = perf_swevent_disable,
.read = perf_swevent_read,
@@ -4295,7 +4295,7 @@ static void cpu_clock_perf_event_read(struct perf_event *event)
cpu_clock_perf_event_update(event);
}
-static const struct pmu perf_ops_cpu_clock = {
+static struct pmu perf_ops_cpu_clock = {
.enable = cpu_clock_perf_event_enable,
.disable = cpu_clock_perf_event_disable,
.read = cpu_clock_perf_event_read,
@@ -4352,7 +4352,7 @@ static void task_clock_perf_event_read(struct perf_event *event)
task_clock_perf_event_update(event, time);
}
-static const struct pmu perf_ops_task_clock = {
+static struct pmu perf_ops_task_clock = {
.enable = task_clock_perf_event_enable,
.disable = task_clock_perf_event_disable,
.read = task_clock_perf_event_read,
@@ -4493,7 +4493,7 @@ static void tp_perf_event_destroy(struct perf_event *event)
swevent_hlist_put(event);
}
-static const struct pmu *tp_perf_event_init(struct perf_event *event)
+static struct pmu *tp_perf_event_init(struct perf_event *event)
{
int err;
@@ -4550,7 +4550,7 @@ static int perf_tp_event_match(struct perf_event *event,
return 1;
}
-static const struct pmu *tp_perf_event_init(struct perf_event *event)
+static struct pmu *tp_perf_event_init(struct perf_event *event)
{
return NULL;
}
@@ -4572,7 +4572,7 @@ static void bp_perf_event_destroy(struct perf_event *event)
release_bp_slot(event);
}
-static const struct pmu *bp_perf_event_init(struct perf_event *bp)
+static struct pmu *bp_perf_event_init(struct perf_event *bp)
{
int err;
@@ -4596,7 +4596,7 @@ void perf_bp_event(struct perf_event *bp, void *data)
perf_swevent_add(bp, 1, 1, &sample, regs);
}
#else
-static const struct pmu *bp_perf_event_init(struct perf_event *bp)
+static struct pmu *bp_perf_event_init(struct perf_event *bp)
{
return NULL;
}
@@ -4618,9 +4618,9 @@ static void sw_perf_event_destroy(struct perf_event *event)
swevent_hlist_put(event);
}
-static const struct pmu *sw_perf_event_init(struct perf_event *event)
+static struct pmu *sw_perf_event_init(struct perf_event *event)
{
- const struct pmu *pmu = NULL;
+ struct pmu *pmu = NULL;
u64 event_id = event->attr.config;
/*
@@ -4682,7 +4682,7 @@ perf_event_alloc(struct perf_event_attr *attr,
perf_overflow_handler_t overflow_handler,
gfp_t gfpflags)
{
- const struct pmu *pmu;
+ struct pmu *pmu;
struct perf_event *event;
struct hw_perf_event *hwc;
long err;
--
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