commit: be8cfc4af15cf611dfeb66a1fb5df43d5f1e280a
From: Mark Salter <[email protected]>
Date: Mon, 24 Sep 2012 17:17:38 -0700
Subject: c/r: prctl: fix build error for no-MMU case
Commit 1ad75b9e1628 ("c/r: prctl: add minimal address test to
PR_SET_MM") added some address checking to prctl_set_mm() used by
checkpoint-restore. This causes a build error for no-MMU systems:
kernel/sys.c: In function 'prctl_set_mm':
kernel/sys.c:1868:34: error: 'mmap_min_addr' undeclared (first use in this
function)
The test for mmap_min_addr doesn't make a lot of sense for no-MMU code
as noted in commit 6e1415467614 ("NOMMU: Optimise away the
{dac_,}mmap_min_addr tests").
This patch defines mmap_min_addr as 0UL in the no-MMU case so that the
compiler will optimize away tests for "addr < mmap_min_addr".
Signed-off-by: Mark Salter <[email protected]>
Reviewed-by: Cyrill Gorcunov <[email protected]>
Cc: <[email protected]> [3.6.x]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
---
include/linux/security.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/include/linux/security.h b/include/linux/security.h
index 3dea6a9..d143b8e 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -118,6 +118,7 @@ void reset_security_ops(void);
extern unsigned long mmap_min_addr;
extern unsigned long dac_mmap_min_addr;
#else
+#define mmap_min_addr 0UL
#define dac_mmap_min_addr 0UL
#endif
--
1.7.3.4
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