From babe53b11312e1aa8dc135bcbdb40043aada10fe Mon Sep 17 00:00:00 2001
From: Masatake YAMATO <yamato@redhat.com>
Date: Mon, 4 Feb 2008 22:29:31 -0800
Subject: [PATCH] --- yaml --- r: 83099 b: refs/heads/master c:
 b5beb1caff4ce063e6e2dc13f23b80eeef4e9782 h: refs/heads/master i:   83097:
 2166e09be1938bcb09c866e6d2305365ee6dd0fd   83095:
 b64a2116c15a107399fe02f4a1fec6996fcfbd00 v: v3

---
 [refs]             |  2 +-
 trunk/mm/fadvise.c | 16 ++++++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 378629a52fcc..5c96f39982a5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e6f3602d2c58815775b2a293cec6650622236169
+refs/heads/master: b5beb1caff4ce063e6e2dc13f23b80eeef4e9782
diff --git a/trunk/mm/fadvise.c b/trunk/mm/fadvise.c
index 0df4c899e979..3c0f1e99f5e4 100644
--- a/trunk/mm/fadvise.c
+++ b/trunk/mm/fadvise.c
@@ -49,9 +49,21 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
 		goto out;
 	}
 
-	if (mapping->a_ops->get_xip_page)
-		/* no bad return value, but ignore advice */
+	if (mapping->a_ops->get_xip_page) {
+		switch (advice) {
+		case POSIX_FADV_NORMAL:
+		case POSIX_FADV_RANDOM:
+		case POSIX_FADV_SEQUENTIAL:
+		case POSIX_FADV_WILLNEED:
+		case POSIX_FADV_NOREUSE:
+		case POSIX_FADV_DONTNEED:
+			/* no bad return value, but ignore advice */
+			break;
+		default:
+			ret = -EINVAL;
+		}
 		goto out;
+	}
 
 	/* Careful about overflows. Len == 0 means "as much as possible" */
 	endbyte = offset + len;