GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-19 13:11:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

percpu: add __percpu sparse annotations to core kernel subsystems

Browse source 
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
parent ab386128f2
commit 43cf38eb5c
11 changed files with 22 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

18
mm/percpu.c
View file

@ -80,13 +80,15 @@
/* default addr <-> pcpu_ptr mapping, override in asm/percpu.h if necessary */
#ifndef __addr_to_pcpu_ptr
#define __addr_to_pcpu_ptr(addr) \
(void *)((unsigned long)(addr) - (unsigned long)pcpu_base_addr \
+ (unsigned long)__per_cpu_start)
(void __percpu *)((unsigned long)(addr) - \
(unsigned long)pcpu_base_addr + \
(unsigned long)__per_cpu_start)
#endif
#ifndef __pcpu_ptr_to_addr
#define __pcpu_ptr_to_addr(ptr) \
(void *)((unsigned long)(ptr) + (unsigned long)pcpu_base_addr \
- (unsigned long)__per_cpu_start)
(void __force *)((unsigned long)(ptr) + \
(unsigned long)pcpu_base_addr - \
(unsigned long)__per_cpu_start)
#endif
struct pcpu_chunk {
@ -1065,7 +1067,7 @@ static struct pcpu_chunk *alloc_pcpu_chunk(void)
* RETURNS:
* Percpu pointer to the allocated area on success, NULL on failure.
*/
static void *pcpu_alloc(size_t size, size_t align, bool reserved)
static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved)
{
static int warn_limit = 10;
struct pcpu_chunk *chunk;
@ -1194,7 +1196,7 @@ fail_unlock_mutex:
* RETURNS:
* Percpu pointer to the allocated area on success, NULL on failure.
*/
void *__alloc_percpu(size_t size, size_t align)
void __percpu *__alloc_percpu(size_t size, size_t align)
{
return pcpu_alloc(size, align, false);
}
@ -1215,7 +1217,7 @@ EXPORT_SYMBOL_GPL(__alloc_percpu);
* RETURNS:
* Percpu pointer to the allocated area on success, NULL on failure.
*/
void *__alloc_reserved_percpu(size_t size, size_t align)
void __percpu *__alloc_reserved_percpu(size_t size, size_t align)
{
return pcpu_alloc(size, align, true);
}
@ -1267,7 +1269,7 @@ static void pcpu_reclaim(struct work_struct *work)
* CONTEXT:
* Can be called from atomic context.
*/
void free_percpu(void *ptr)
void free_percpu(void __percpu *ptr)
{
void *addr;
struct pcpu_chunk *chunk;