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percpu: add __percpu sparse annotations to core kernel subsystems

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Add __percpu sparse annotations to core subsystems.

These annotations are to make sparse consider percpu variables to be
in a different address space and warn if accessed without going
through percpu accessors.  This patch doesn't affect normal builds.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-mm@kvack.org
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Eric Biederman <ebiederm@xmission.com>
This commit is contained in:
Tejun Heo 2010-02-02 14:38:57 +09:00
commit 43cf38eb5c
11 changed files with 22 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/linux/blktrace_api.h
View file

@ -150,8 +150,8 @@ struct blk_user_trace_setup {
struct blk_trace {
int trace_state;
struct rchan *rchan;
unsigned long *sequence;
unsigned char *msg_data;
unsigned long __percpu *sequence;
unsigned char __percpu *msg_data;
u16 act_mask;
u64 start_lba;
u64 end_lba;

2
include/linux/genhd.h
View file

@ -101,7 +101,7 @@ struct hd_struct {
unsigned long stamp;
int in_flight[2];
#ifdef CONFIG_SMP
struct disk_stats *dkstats;
struct disk_stats __percpu *dkstats;
#else
struct disk_stats dkstats;
#endif

2
include/linux/kexec.h
View file

@ -199,7 +199,7 @@ extern struct kimage *kexec_crash_image;
*/
extern struct resource crashk_res;
typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4];
extern note_buf_t *crash_notes;
extern note_buf_t __percpu *crash_notes;
extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
extern size_t vmcoreinfo_size;
extern size_t vmcoreinfo_max_size;

2
include/linux/mmzone.h
View file

@ -301,7 +301,7 @@ struct zone {
unsigned long min_unmapped_pages;
unsigned long min_slab_pages;
#endif
struct per_cpu_pageset *pageset;
struct per_cpu_pageset __percpu *pageset;
/*
* free areas of different sizes
*/

2
include/linux/module.h
View file

@ -365,7 +365,7 @@ struct module
struct module_ref {
int count;
} *refptr;
} __percpu *refptr;
#endif
#ifdef CONFIG_CONSTRUCTORS

2
include/linux/percpu_counter.h
View file

@ -21,7 +21,7 @@ struct percpu_counter {
#ifdef CONFIG_HOTPLUG_CPU
struct list_head list; /* All percpu_counters are on a list */
#endif
s32 *counters;
s32 __percpu *counters;
};
extern int percpu_counter_batch;

2
include/linux/srcu.h
View file

@ -33,7 +33,7 @@ struct srcu_struct_array {
struct srcu_struct {
int completed;
struct srcu_struct_array *per_cpu_ref;
struct srcu_struct_array __percpu *per_cpu_ref;
struct mutex mutex;
};