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authorHugh Dickins <hugh@veritas.com>2009-01-06 14:39:47 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 15:59:05 -0800
commit73fd8748ab0b9b3ddd178bea1d7ae03372033d96 (patch)
tree6c0173c84ff6ace213578a9a8b03fd73e23ec8ad /mm
parent69beeb1d3428424fbc7546f85e5cd7ac4119c09d (diff)
swapfile: swapon needs larger size type
sys_swapon()'s swapfilesize (better renamed swapfilepages) is declared as an int, but should be an unsigned long like the maxpages it's compared against: on 64-bit (with 4kB pages) a swapfile of 2^44 bytes was rejected with "Swap area shorter than signature indicates". Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.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>
Diffstat (limited to 'mm')
-rw-r--r--mm/swapfile.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 725e56c362de..e2adc8eb9317 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1461,7 +1461,7 @@ asmlinkage long sys_swapon(const char __user * specialfile, int swap_flags)
int nr_extents = 0;
sector_t span;
unsigned long maxpages = 1;
- int swapfilesize;
+ unsigned long swapfilepages;
unsigned short *swap_map = NULL;
struct page *page = NULL;
struct inode *inode = NULL;
@@ -1539,7 +1539,7 @@ asmlinkage long sys_swapon(const char __user * specialfile, int swap_flags)
goto bad_swap;
}
- swapfilesize = i_size_read(inode) >> PAGE_SHIFT;
+ swapfilepages = i_size_read(inode) >> PAGE_SHIFT;
/*
* Read the swap header.
@@ -1616,7 +1616,7 @@ asmlinkage long sys_swapon(const char __user * specialfile, int swap_flags)
error = -EINVAL;
if (!maxpages)
goto bad_swap;
- if (swapfilesize && maxpages > swapfilesize) {
+ if (swapfilepages && maxpages > swapfilepages) {
printk(KERN_WARNING
"Swap area shorter than signature indicates\n");
goto bad_swap;