From: Toshi Kani <toshi.kani@xxxxxxx>
Subject: devm_memremap_release(): fix memremap'd addr handling
The pmem driver calls devm_memremap() to map a persistent memory range.
When the pmem driver is unloaded, this memremap'd range is not
released so the kernel will leak a vma.
Fix devm_memremap_release() to handle a given memremap'd address properly.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
Acked-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/memremap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/memremap.c~devm_memremap_release-fix-memremapd-addr-handling kernel/memremap.c
--- a/kernel/memremap.c~devm_memremap_release-fix-memremapd-addr-handling
+++ a/kernel/memremap.c
@@ -114,7 +114,7 @@ EXPORT_SYMBOL(memunmap);
static void devm_memremap_release(struct device *dev, void *res)
{
- memunmap(res);
+ memunmap(*(void **)res);
}
static int devm_memremap_match(struct device *dev, void *res, void *match_data)
_
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