commit 213b24c93b6c43d96973b9db453bf845c97bbe18
author Greg Ungerer <gerg@snapgear.com> Fri Sep 02 10:42:52 2005 +1000
committer Linus Torvalds <torvalds@evo.osdl.org> Fri Sep 02 00:57:31 2005 -0700
tree d47aea7e40411d997392b1ce12cc82fd02908ec8
parent 03a002e783b71517a5203e681f84a2719e9cec0e

[PATCH] uclinux: use MAP_PRIVATE when mmaping code regions in flat binary loader

Use MAP_PRIVATE when calling mmap to get memory for the code region.
The flat loader was using MAP_SHARED, but underlying changes to the
MMUless mmap means this is now wrong.

Signed-off-by: Greg Ungerer <gerg@uclinux.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/binfmt_flat.c

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index c8998dc..7974efa 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -520,7 +520,7 @@
 		DBG_FLT("BINFMT_FLAT: ROM mapping of file (we hope)\n");
 
 		down_write(&current->mm->mmap_sem);
-		textpos = do_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC, MAP_SHARED, 0);
+		textpos = do_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC, MAP_PRIVATE, 0);
 		up_write(&current->mm->mmap_sem);
 		if (!textpos  || textpos >= (unsigned long) -4096) {
 			if (!textpos)