linux-kernel - [PATCH 3/4] mm: move gup() -> posix mlock() error conversion out of __mm

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Date:	Wed, 11 Feb 2015 19:12:07 +0200
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Michel Lespinasse <walken@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH 3/4] mm: move gup() -> posix mlock() error conversion out of __mm_populate

This is praparation to moving mm_populate()-related code out of
mm/mlock.c.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 mm/mlock.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/mm/mlock.c b/mm/mlock.c
index c3ea18323034..0837fdb26047 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -712,7 +712,6 @@ int __mm_populate(unsigned long start, unsigned long len, int ignore_errors)
 				ret = 0;
 				continue;	/* continue at next VMA */
 			}
-			ret = __mlock_posix_error_return(ret);
 			break;
 		}
 		nend = nstart + ret * PAGE_SIZE;
@@ -750,9 +749,13 @@ SYSCALL_DEFINE2(mlock, unsigned long, start, size_t, len)
 		error = do_mlock(start, len, 1);
 
 	up_write(&current->mm->mmap_sem);
-	if (!error)
-		error = __mm_populate(start, len, 0);
-	return error;
+	if (error)
+		return error;
+
+	error = __mm_populate(start, len, 0);
+	if (error)
+		return  __mlock_posix_error_return(error);
+	return 0;
 }
 
 SYSCALL_DEFINE2(munlock, unsigned long, start, size_t, len)
-- 
2.1.4

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