From: Mark Salter <[email protected]>
Subject: c/r: prctl: fix build error for no-MMU case
Commit 1ad75b9e1 ("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 6e1415467. 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]>
---
include/linux/security.h | 1 +
1 file changed, 1 insertion(+)
diff -puN include/linux/security.h~c-r-prctl-fix-build-error-for-no-mmu-case
include/linux/security.h
--- a/include/linux/security.h~c-r-prctl-fix-build-error-for-no-mmu-case
+++ a/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
_
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