The patch titled
Subject: vfree, kvfree: add debug might_sleep()s
has been added to the -mm tree. Its filename is
vfree-kvfree-add-debug-might-sleeps.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/vfree-kvfree-add-debug-might-sleeps.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/vfree-kvfree-add-debug-might-sleeps.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: vfree, kvfree: add debug might_sleep()s
Add might_sleep() calls to vfree(), kvfree() to catch potential
sleep-in-atomic bugs earlier.
Link: http://lkml.kernel.org/r/20180914130512.10394-3-aryabinin@xxxxxxxxxxxxx
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/util.c | 2 ++
mm/vmalloc.c | 2 ++
2 files changed, 4 insertions(+)
--- a/mm/util.c~vfree-kvfree-add-debug-might-sleeps
+++ a/mm/util.c
@@ -446,6 +446,8 @@ EXPORT_SYMBOL(kvmalloc_node);
*/
void kvfree(const void *addr)
{
+ might_sleep_if(!in_interrupt());
+
if (is_vmalloc_addr(addr))
vfree(addr);
else
--- a/mm/vmalloc.c~vfree-kvfree-add-debug-might-sleeps
+++ a/mm/vmalloc.c
@@ -1587,6 +1587,8 @@ void vfree(const void *addr)
kmemleak_free(addr);
+ might_sleep_if(!in_interrupt());
+
if (!addr)
return;
if (unlikely(in_interrupt()))
_
Patches currently in -mm which might be from aryabinin@xxxxxxxxxxxxx are
kvfree-fix-misleading-comment.patch
mm-vmalloc-improve-vfree-kerneldoc.patch
vfree-kvfree-add-debug-might-sleeps.patch
