From 9e2779fa281cfda13ac060753d674bbcaa23367e Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Mon, 4 Feb 2008 22:28:34 -0800 Subject: [PATCH] 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 --- drivers/net/cxgb3/cxgb3_offload.c | 4 +--- fs/ntfs/malloc.h | 3 +-- fs/proc/kcore.c | 2 +- fs/xfs/linux-2.6/kmem.c | 3 +-- fs/xfs/linux-2.6/xfs_buf.c | 3 +-- include/linux/mm.h | 8 ++++++++ mm/sparse.c | 10 +--------- 7 files changed, 14 insertions(+), 19 deletions(-) diff --git a/drivers/net/cxgb3/cxgb3_offload.c b/drivers/net/cxgb3/cxgb3_offload.c index d48c396bda..901c824bfe 100644 --- a/drivers/net/cxgb3/cxgb3_offload.c +++ b/drivers/net/cxgb3/cxgb3_offload.c @@ -1070,9 +1070,7 @@ void *cxgb_alloc_mem(unsigned long size) */ void cxgb_free_mem(void *addr) { - unsigned long p = (unsigned long)addr; - - if (p >= VMALLOC_START && p < VMALLOC_END) + if (is_vmalloc_addr(addr)) vfree(addr); else kfree(addr); diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h index e38e402e41..cd0be3f5c3 100644 --- a/fs/ntfs/malloc.h +++ b/fs/ntfs/malloc.h @@ -85,8 +85,7 @@ static inline void *ntfs_malloc_nofs_nofail(unsigned long size) static inline void ntfs_free(void *addr) { - if (likely(((unsigned long)addr < VMALLOC_START) || - ((unsigned long)addr >= VMALLOC_END ))) { + if (!is_vmalloc_addr(addr)) { kfree(addr); /* free_page((unsigned long)addr); */ return; diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 1be73082ed..7dd26e18cb 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -325,7 +325,7 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos) if (m == NULL) { if (clear_user(buffer, tsz)) return -EFAULT; - } else if ((start >= VMALLOC_START) && (start < VMALLOC_END)) { + } else if (is_vmalloc_addr((void *)start)) { char * elf_buf; struct vm_struct *m; unsigned long curstart = start; diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c index ed2b16dff9..e040f1ce1b 100644 --- a/fs/xfs/linux-2.6/kmem.c +++ b/fs/xfs/linux-2.6/kmem.c @@ -92,8 +92,7 @@ kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize, void kmem_free(void *ptr, size_t size) { - if (((unsigned long)ptr < VMALLOC_START) || - ((unsigned long)ptr >= VMALLOC_END)) { + if (!is_vmalloc_addr(ptr)) { kfree(ptr); } else { vfree(ptr); diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index a49dd8d4b0..0382c19d65 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -709,8 +709,7 @@ static inline struct page * mem_to_page( void *addr) { - if (((unsigned long)addr < VMALLOC_START) || - ((unsigned long)addr >= VMALLOC_END)) { + if ((!is_vmalloc_addr(addr))) { return virt_to_page(addr); } else { return vmalloc_to_page(addr); diff --git a/include/linux/mm.h b/include/linux/mm.h index a862a96952..f28a033857 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))) diff --git a/mm/sparse.c b/mm/sparse.c index a2183cb5d5..7859c80833 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -353,17 +353,9 @@ static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid, return __kmalloc_section_memmap(nr_pages); } -static int vaddr_in_vmalloc_area(void *addr) -{ - if (addr >= (void *)VMALLOC_START && - addr < (void *)VMALLOC_END) - return 1; - return 0; -} - static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages) { - if (vaddr_in_vmalloc_area(memmap)) + if (is_vmalloc_addr(memmap)) vfree(memmap); else free_pages((unsigned long)memmap, -- 2.39.5