From 9e2779fa281cfda13ac060753d674bbcaa23367e Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Mon, 4 Feb 2008 22:28:34 -0800 Subject: is_vmalloc_addr(): Check if an address is within the vmalloc boundaries Checking if an address is a vmalloc address is done in a couple of places. Define a common version in mm.h and replace the other checks. Again the include structures suck. The definition of VMALLOC_START and VMALLOC_END is not available in vmalloc.h since highmem.c cannot be included there. Signed-off-by: Christoph Lameter Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mm.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux/mm.h') diff --git a/include/linux/mm.h b/include/linux/mm.h index a862a96952e..f28a0338574 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -235,6 +235,14 @@ static inline int get_page_unless_zero(struct page *page) struct page *vmalloc_to_page(const void *addr); unsigned long vmalloc_to_pfn(const void *addr); +/* Determine if an address is within the vmalloc range */ +static inline int is_vmalloc_addr(const void *x) +{ + unsigned long addr = (unsigned long)x; + + return addr >= VMALLOC_START && addr < VMALLOC_END; +} + static inline struct page *compound_head(struct page *page) { if (unlikely(PageTail(page))) -- cgit v1.2.3