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authorDavid Howells <dhowells@redhat.com>2009-09-24 12:33:48 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-24 17:20:29 -0700
commit06aab5a3084e1d825384fa353e6df4c7949c8683 (patch)
treef4db2f267151e2173b86ee4b945bf07688d6ffd2 /mm/nommu.c
parent934831d060ccd5471ecbc562804a8d3ccd6e562c (diff)
downloadvexpress-lsk-06aab5a3084e1d825384fa353e6df4c7949c8683.tar.gz
NOMMU: Ignore mmap() address param as it is a hint
Ignore the address parameter given to NOMMU mmap() as it is a hint, rather than giving an error if it's non-zero. MAP_FIXED still gets an error. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nommu.c')
-rw-r--r--mm/nommu.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index 6a002abcb58..c73aa4753d7 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -826,7 +826,7 @@ static int validate_mmap_request(struct file *file,
int ret;
/* do the simple checks first */
- if (flags & MAP_FIXED || addr) {
+ if (flags & MAP_FIXED) {
printk(KERN_DEBUG
"%d: Can't do fixed-address/overlay mmap of RAM\n",
current->pid);
@@ -1182,9 +1182,6 @@ unsigned long do_mmap_pgoff(struct file *file,
kenter(",%lx,%lx,%lx,%lx,%lx", addr, len, prot, flags, pgoff);
- if (!(flags & MAP_FIXED))
- addr = round_hint_to_min(addr);
-
/* decide whether we should attempt the mapping, and if so what sort of
* mapping */
ret = validate_mmap_request(file, addr, len, prot, flags, pgoff,
@@ -1194,6 +1191,9 @@ unsigned long do_mmap_pgoff(struct file *file,
return ret;
}
+ /* we ignore the address hint */
+ addr = 0;
+
/* we've determined that we can make the mapping, now translate what we
* now know into VMA flags */
vm_flags = determine_vm_flags(file, prot, flags, capabilities);