[patch 1/2] slab: add taint flag outputting to debug paths.

[patch 1/2] slab: add taint flag outputting to debug paths.

[akpm]

From: Dave Jones <davej@redhat.com>
Subject: slab: add taint flag outputting to debug paths.

When we get corruption reports, it's useful to see if the kernel was
tainted, to rule out problems we can't do anything about.

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slab.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff -puN mm/slab.c~slab-add-taint-flag-outputting-to-debug-paths mm/slab.c
--- a/mm/slab.c~slab-add-taint-flag-outputting-to-debug-paths
+++ a/mm/slab.c
@@ -1941,8 +1941,8 @@ static void check_poison_obj(struct kmem
 			/* Print header */
 			if (lines == 0) {
 				printk(KERN_ERR
-					"Slab corruption: %s start=%p, len=%d\n",
-					cachep->name, realobj, size);
+					"Slab corruption (%s): %s start=%p, len=%d\n",
+					print_tainted(), cachep->name, realobj, size);
 				print_objinfo(cachep, objp, 0);
 			}
 			/* Hexdump the affected line */
@@ -3051,8 +3051,9 @@ static void check_slabp(struct kmem_cach
 	if (entries != cachep->num - slabp->inuse) {
 bad:
 		printk(KERN_ERR "slab: Internal list corruption detected in "
-				"cache '%s'(%d), slabp %p(%d). Hexdump:\n",
-			cachep->name, cachep->num, slabp, slabp->inuse);
+			"cache '%s'(%d), slabp %p(%d). Tainted(%s). Hexdump:\n",
+			cachep->name, cachep->num, slabp, slabp->inuse,
+			print_tainted());
 		print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, slabp,
 			sizeof(*slabp) + cachep->num * sizeof(kmem_bufctl_t),
 			1);
_

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