From: gaoxiang17 <gaoxiang17@xxxxxxxxxx>
before:
[ 24.407814] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0)
[ 24.413397] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0)
[ 24.415886] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0)
after:
[ 24.069738] cma: cma_alloc(cma (____ptrval____), name: reserved, total pages: 16384, used pages: 64, request pages: 1, align 0)
[ 24.075317] cma: cma_alloc(cma (____ptrval____), name: reserved, total pages: 16384, used pages: 65, request pages: 1, align 0)
[ 24.078455] cma: cma_alloc(cma (____ptrval____), name: reserved, total pages: 16384, used pages: 66, request pages: 1, align 0)
Signed-off-by: gaoxiang17 <gaoxiang17@xxxxxxxxxx>
---
mm/cma.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/mm/cma.c b/mm/cma.c
index 2d9fae939283..90b3fdbac19c 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -403,6 +403,17 @@ static void cma_debug_show_areas(struct cma *cma)
spin_unlock_irq(&cma->lock);
}
+static unsigned long cma_get_used_pages(struct cma *cma)
+{
+ unsigned long used;
+
+ spin_lock_irq(&cma->lock);
+ used = bitmap_weight(cma->bitmap, (int)cma_bitmap_maxno(cma));
+ spin_unlock_irq(&cma->lock);