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resource: allow MMIO exclusivity for device drivers
[deliverable/linux.git]
/
arch
/
x86
/
mm
/
init_64.c
diff --git
a/arch/x86/mm/init_64.c
b/arch/x86/mm/init_64.c
index 54c437e96541f2764aaeb566793b092e2af2f219..23f68e77ad1fde95975c5b6e3cf163eb7850f305 100644
(file)
--- a/
arch/x86/mm/init_64.c
+++ b/
arch/x86/mm/init_64.c
@@
-888,6
+888,8
@@
int devmem_is_allowed(unsigned long pagenr)
{
if (pagenr <= 256)
return 1;
+ if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
+ return 0;
if (!page_is_ram(pagenr))
return 1;
return 0;
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