linux-kernel - [PATCH 2/3] mm/vmalloc: Improve vfree() kerneldoc

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Message-Id: <20180914130512.10394-2-aryabinin@virtuozzo.com>
Date:   Fri, 14 Sep 2018 16:05:11 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: [PATCH 2/3] mm/vmalloc: Improve vfree() kerneldoc

vfree() might sleep if called not in interrupt context. Explain
that in the comment.

Signed-off-by: Andrey Ryabinin <aryabinin@...tuozzo.com>
---
 mm/vmalloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index a728fc492557..d00d42d6bf79 100644
--- a/mm/vmalloc.c
+++ b/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)
-- 
2.16.4