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authorPaul Mundt <lethal@linux-sh.org>2008-03-12 03:51:31 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-12 15:34:37 -0400
commit0738c4bb8f2a8bf15178f852494643b0981f578b (patch)
tree929e985eb01594298dab4c1278d3aec9b0ec4c18 /include
parentbaadac8b10c5ac15ce3d26b68fa266c8889b163f (diff)
nommu: Provide is_vmalloc_addr() stub.
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@linux-sh.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h13
1 files changed, 10 insertions, 3 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3f3ccfe42de0..b695875d63e3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -235,15 +235,22 @@ static inline int get_page_unless_zero(struct page *page)
235struct page *vmalloc_to_page(const void *addr); 235struct page *vmalloc_to_page(const void *addr);
236unsigned long vmalloc_to_pfn(const void *addr); 236unsigned long vmalloc_to_pfn(const void *addr);
237 237
238#ifdef CONFIG_MMU 238/*
239/* Determine if an address is within the vmalloc range */ 239 * Determine if an address is within the vmalloc range
240 *
241 * On nommu, vmalloc/vfree wrap through kmalloc/kfree directly, so there
242 * is no special casing required.
243 */
240static inline int is_vmalloc_addr(const void *x) 244static inline int is_vmalloc_addr(const void *x)
241{ 245{
246#ifdef CONFIG_MMU
242 unsigned long addr = (unsigned long)x; 247 unsigned long addr = (unsigned long)x;
243 248
244 return addr >= VMALLOC_START && addr < VMALLOC_END; 249 return addr >= VMALLOC_START && addr < VMALLOC_END;
245} 250#else
251 return 0;
246#endif 252#endif
253}
247 254
248static inline struct page *compound_head(struct page *page) 255static inline struct page *compound_head(struct page *page)
249{ 256{