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authorJeremy Fitzhardinge <jeremy@goop.org>2009-03-06 10:09:26 -0800
committerIngo Molnar <mingo@elte.hu>2009-03-08 20:03:52 +0100
commit0feca851c1b3cb4ebfa3149144b3d5de0879ebaa (patch)
tree41762096e1faebbc512b07fcfb7627fa2d1c688e
parente954ef20c29b7af07a8cb5452f14fb69e3d9d2b2 (diff)
x86-32: make sure virt_addr_valid() returns false for fixmap addresses
I found that virt_addr_valid() was returning true for fixmap addresses. I'm not sure whether pfn_valid() is supposed to include this test, but there's no harm in being explicit. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Jiri Slaby <jirislaby@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <49B166D6.2080505@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/mm/ioremap.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 62773abdf08..62def579573 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -87,6 +87,8 @@ bool __virt_addr_valid(unsigned long x)
return false;
if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
return false;
+ if (x >= FIXADDR_START)
+ return false;
return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
}
EXPORT_SYMBOL(__virt_addr_valid);