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authorSasha Levin <sasha.levin@oracle.com>2015-04-14 15:44:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-14 16:49:00 -0700
commit26b02a1f9670862c51b3ff63a6128589866f5c71 (patch)
treea271f168640f4f89ceab15d354f2772f4e363091 /mm/cma.c
parent28b24c1fc8c22cabe5b8a16ffe6a61dfce51a1f2 (diff)
downloadlwn-26b02a1f9670862c51b3ff63a6128589866f5c71.tar.gz
lwn-26b02a1f9670862c51b3ff63a6128589866f5c71.zip
mm: cma: allocation trigger
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>
Diffstat (limited to 'mm/cma.c')
-rw-r--r--mm/cma.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/cma.c b/mm/cma.c
index 2655b8191656..7f6045420925 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -123,6 +123,12 @@ static int __init cma_activate_area(struct cma *cma)
} while (--i);
mutex_init(&cma->lock);
+
+#ifdef CONFIG_CMA_DEBUGFS
+ INIT_HLIST_HEAD(&cma->mem_head);
+ spin_lock_init(&cma->mem_head_lock);
+#endif
+
return 0;
err: