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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2016-03-17 14:17:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 15:09:34 -0700
commit505f6d22dbc63f333d1178dc80264e40b5c35268 (patch)
tree18c7f9c32bb107e91654baf4a702c1bc7804a2bc /mm
parent922d566cdcb7166c729ff67bb15ff5f93a3774b6 (diff)
downloadlinux-505f6d22dbc63f333d1178dc80264e40b5c35268.tar.bz2
sound: query dynamic DEBUG_PAGEALLOC setting
We can disable debug_pagealloc processing even if the code is compiled with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query whether it is enabled or not in runtime. [akpm@linux-foundation.org: export _debug_pagealloc_enabled to modules] Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Takashi Iwai <tiwai@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c7332a4bc8db..b1fc19ebb8a2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -498,6 +498,7 @@ void prep_compound_page(struct page *page, unsigned int order)
unsigned int _debug_guardpage_minorder;
bool _debug_pagealloc_enabled __read_mostly
= IS_ENABLED(CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT);
+EXPORT_SYMBOL(_debug_pagealloc_enabled);
bool _debug_guardpage_enabled __read_mostly;
static int __init early_debug_pagealloc(char *buf)