The patch titled
nommu: provide is_vmalloc_addr() stub
has been added to the -mm tree. Its filename is
nommu-provide-is_vmalloc_addr-stub.patch
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Subject: nommu: provide is_vmalloc_addr() stub
From: Paul Mundt <lethal@xxxxxxxxxxxx>
Introduced in commit-id 9e2779fa281cfda13ac060753d674bbcaa23367e and ifdef'ed
out for nommu in 8ca3ed87db062201e1fa15b64a9214e193fc3a8a, both approaches end
up breaking the nommu build in different ways. An impressive feat for a
2-liner.
Current is_vmalloc_addr() users fall in to two camps:
- Determining whether to use vfree()/kfree()
- Whether to do vmlist traversal (only /proc/kcore).
Since we don't support /proc/kcore on nommu, that leaves the vfree()/kfree()
determination use cases. nommu vfree() happens to be a wrapper to kfree()
anyways, so is_vmalloc_addr() can always return 0 and end up with the right
behaviour.
Signed-off-by: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff -puN include/linux/mm.h~nommu-provide-is_vmalloc_addr-stub include/linux/mm.h
--- a/include/linux/mm.h~nommu-provide-is_vmalloc_addr-stub
+++ a/include/linux/mm.h
@@ -235,15 +235,22 @@ static inline int get_page_unless_zero(s
struct page *vmalloc_to_page(const void *addr);
unsigned long vmalloc_to_pfn(const void *addr);
-#ifdef CONFIG_MMU
-/* Determine if an address is within the vmalloc range */
+/*
+ * Determine if an address is within the vmalloc range
+ *
+ * On nommu, vmalloc/vfree wrap through kmalloc/kfree directly, so there
+ * is no special casing required.
+ */
static inline int is_vmalloc_addr(const void *x)
{
+#ifdef CONFIG_MMU
unsigned long addr = (unsigned long)x;
return addr >= VMALLOC_START && addr < VMALLOC_END;
-}
+#else
+ return 0;
#endif
+}
static inline struct page *compound_head(struct page *page)
{
_
Patches currently in -mm which might be from lethal@xxxxxxxxxxxx are
nommu-provide-is_vmalloc_addr-stub.patch
maple-allow-removal-and-reinsertion-of-keyboard-driver-module.patch
maple-add-driver-for-sega-dreamcast-controller.patch
smc91x-pass-along-private-data-v2.patch
smc91x-introduce-platform-data-flags-v2.patch
smc91x-add-insw-outsw-to-default-config-v2.patch
smc91x-make-superh-use-default-config-v2.patch
git-sh.patch
smc91x-fix-build-breakage-from-the-smc_get_mac_addr-api-upgrade.patch
taint-kernel-after-warn_oncondition.patch
sm501-add-uart-support.patch
asm-futexh-should-include-linux-uaccessh.patch
remove-duplicated-unlikely-in-is_err.patch
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