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authorChristoph Lameter <clameter@sgi.com>2008-02-04 22:28:34 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:14 -0800
commit9e2779fa281cfda13ac060753d674bbcaa23367e (patch)
treee2af17d69b71e0f8b3f00fe949cb8abfba4298ed
parent0b7a96114bd5991d355a1f1c1d3d9c0c9d9c1cfc (diff)
downloadop-kernel-dev-9e2779fa281cfda13ac060753d674bbcaa23367e.zip
op-kernel-dev-9e2779fa281cfda13ac060753d674bbcaa23367e.tar.gz
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 <clameter@sgi.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/net/cxgb3/cxgb3_offload.c4
-rw-r--r--fs/ntfs/malloc.h3
-rw-r--r--fs/proc/kcore.c2
-rw-r--r--fs/xfs/linux-2.6/kmem.c3
-rw-r--r--fs/xfs/linux-2.6/xfs_buf.c3
-rw-r--r--include/linux/mm.h8
-rw-r--r--mm/sparse.c10
7 files changed, 14 insertions, 19 deletions
diff --git a/drivers/net/cxgb3/cxgb3_offload.c b/drivers/net/cxgb3/cxgb3_offload.c
index d48c396..901c824 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 e38e402..cd0be3f 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 1be7308..7dd26e1 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 ed2b16d..e040f1c 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 a49dd8d..0382c19 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 a862a96..f28a033 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 a2183cb..7859c80 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,
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