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authorMika Penttilä <mika.penttila@nextfour.com>2016-02-22 17:56:52 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2016-03-04 23:32:45 +0000
commitf474c8c857d996f34c39f66bbed23faaa739fad6 (patch)
tree0a0ae7bb3a9a7c405d6bba7cca7b75dabe5ea1fc
parentc7edd7f99cdaec65e9303b4c9edc19bb595564ed (diff)
downloadlinux-f474c8c857d996f34c39f66bbed23faaa739fad6.tar.bz2
ARM: 8544/1: set_memory_xx fixes
Allow zero size updates. This makes set_memory_xx() consistent with x86, s390 and arm64 and makes apply_to_page_range() not to BUG() when loading modules. Signed-off-by: Mika Penttilä mika.penttila@nextfour.com Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mm/pageattr.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mm/pageattr.c b/arch/arm/mm/pageattr.c
index cf30daff8932..d19b1ad29b07 100644
--- a/arch/arm/mm/pageattr.c
+++ b/arch/arm/mm/pageattr.c
@@ -49,6 +49,9 @@ static int change_memory_common(unsigned long addr, int numpages,
WARN_ON_ONCE(1);
}
+ if (!numpages)
+ return 0;
+
if (start < MODULES_VADDR || start >= MODULES_END)
return -EINVAL;