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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-04-06 15:03:40 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-04-28 16:23:24 +1000
commitb4a26be9f6f8bb72998e445cc75fc6dc0c29513a (patch)
tree0cb681f30a873a615d4f4a648fb6ee392b278b06 /arch
parent4b83c330b4d38e869111bda6e9077d4f61ed974a (diff)
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powerpc/pseries: Flush lazy kernel mappings after unplug operations
This ensures that the translations for unmapped IO mappings or unmapped memory are properly removed from the MMU hash table before such an unplug. Without this, the hypervisor refuses the unplug operations due to those resources still being mapped by the partition. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/pseries/hotplug-memory.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 9b21ee68ea5..01e7b5bb3c1 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -11,6 +11,7 @@
#include <linux/of.h>
#include <linux/lmb.h>
+#include <linux/vmalloc.h>
#include <asm/firmware.h>
#include <asm/machdep.h>
#include <asm/pSeries_reconfig.h>
@@ -54,6 +55,12 @@ static int pseries_remove_lmb(unsigned long base, unsigned int lmb_size)
*/
start = (unsigned long)__va(base);
ret = remove_section_mapping(start, start + lmb_size);
+
+ /* Ensure all vmalloc mappings are flushed in case they also
+ * hit that section of memory
+ */
+ vm_unmap_aliases();
+
return ret;
}