The patch titled
Subject: include/linux/poison.h: use POISON_POINTER_DELTA for poison pointers
has been added to the -mm tree. Its filename is
use-poison_pointer_delta-for-poison-pointers.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/use-poison_pointer_delta-for-poison-pointers.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/use-poison_pointer_delta-for-poison-pointers.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Vasily Kulikov <segoon@xxxxxxxxxxxx>
Subject: include/linux/poison.h: use POISON_POINTER_DELTA for poison pointers
TIMER_ENTRY_STATIC and TAIL_MAPPING are defined as poison pointers which
should point to nowhere. Redefine them using POISON_POINTER_DELTA
arithmetics to make sure they really point to non-mappable area declared
by the target architecture.
Signed-off-by: Vasily Kulikov <segoon@xxxxxxxxxxxx>
Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Solar Designer <solar@xxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/poison.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN include/linux/poison.h~use-poison_pointer_delta-for-poison-pointers include/linux/poison.h
--- a/include/linux/poison.h~use-poison_pointer_delta-for-poison-pointers
+++ a/include/linux/poison.h
@@ -27,14 +27,14 @@
* Magic number "tsta" to indicate a static timer initializer
* for the object debugging code.
*/
-#define TIMER_ENTRY_STATIC ((void *) 0x74737461)
+#define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA)
/********** mm/debug-pagealloc.c **********/
#define PAGE_POISON 0xaa
/********** mm/page_alloc.c ************/
-#define TAIL_MAPPING ((void *) 0x01014A11 + POISON_POINTER_DELTA)
+#define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA)
/********** mm/slab.c **********/
/*
_
Patches currently in -mm which might be from segoon@xxxxxxxxxxxx are
fix-list_poison12-offset.patch
use-poison_pointer_delta-for-poison-pointers.patch
remove-not-used-poison-pointer-macros.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
