From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Subject: mm/vmalloc.c: improve vfree() kerneldoc vfree() might sleep if called not in interrupt context. Explain that in the comment. Link: http://lkml.kernel.org/r/20180914130512.10394-2-aryabinin@xxxxxxxxxxxxx Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/vmalloc.c | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/vmalloc.c~mm-vmalloc-improve-vfree-kerneldoc +++ a/mm/vmalloc.c @@ -1577,6 +1577,8 @@ void vfree_atomic(const void *addr) * have CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG, but making the calling * conventions for vfree() arch-depenedent would be a really bad idea) * + * May sleep if called *not* from interrupt context. + * * NOTE: assumes that the object at @addr has a size >= sizeof(llist_node) */ void vfree(const void *addr) _
