mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
26b02a1f96
Provides a userspace interface to trigger a CMA allocation.
Usage:
echo [pages] > alloc
This would provide testing/fuzzing access to the CMA allocation paths.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Laura Abbott <lauraa@codeaurora.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
25 lines
508 B
C
25 lines
508 B
C
#ifndef __MM_CMA_H__
|
|
#define __MM_CMA_H__
|
|
|
|
struct cma {
|
|
unsigned long base_pfn;
|
|
unsigned long count;
|
|
unsigned long *bitmap;
|
|
unsigned int order_per_bit; /* Order of pages represented by one bit */
|
|
struct mutex lock;
|
|
#ifdef CONFIG_CMA_DEBUGFS
|
|
struct hlist_head mem_head;
|
|
spinlock_t mem_head_lock;
|
|
#endif
|
|
};
|
|
|
|
extern struct cma cma_areas[MAX_CMA_AREAS];
|
|
extern unsigned cma_area_count;
|
|
|
|
static unsigned long cma_bitmap_maxno(struct cma *cma)
|
|
{
|
|
return cma->count >> cma->order_per_bit;
|
|
}
|
|
|
|
#endif
|