[tip:WIP.core/stacktrace 24/47] mm/slab.c:1490:11: error: 'trace' undeclared

kbuild test robot
2019-04-15T00:57:58Z

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.core/stacktrace
head: 63c35ea6b829a0f98d307a8dec038095681ecd13
commit: c79cc35c00e9f15a9a32a08569036cb8365c8816 [24/47] mm/slab: Simplify stack trace handling
config: i386-randconfig-a1-201915 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
git checkout c79cc35c00e9f15a9a32a08569036cb8365c8816
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

mm/slab.c: In function 'store_stackinfo':
>> mm/slab.c:1490:11: error: 'trace' undeclared (first use in this function)
addr += trace.nr_entries;
^
mm/slab.c:1490:11: note: each undeclared identifier is reported only once for each function it appears in

vim +/trace +1490 mm/slab.c

^1da177e Linus Torvalds 2005-04-16 1468
^1da177e Linus Torvalds 2005-04-16 1469 #ifdef CONFIG_DEBUG_PAGEALLOC
343e0d7a Pekka Enberg 2006-02-01 1470 static void store_stackinfo(struct kmem_cache *cachep, unsigned long *addr,
^1da177e Linus Torvalds 2005-04-16 1471 unsigned long caller)
^1da177e Linus Torvalds 2005-04-16 1472 {
b8623975 Thomas Gleixner 2019-04-08 1473 int size = cachep->object_size / sizeof(unsigned long);
^1da177e Linus Torvalds 2005-04-16 1474
3dafccf2 Manfred Spraul 2006-02-01 1475 addr = (unsigned long *)&((char *)addr)[obj_offset(cachep)];
^1da177e Linus Torvalds 2005-04-16 1476
b8623975 Thomas Gleixner 2019-04-08 1477 if (size < 5)
^1da177e Linus Torvalds 2005-04-16 1478 return;
^1da177e Linus Torvalds 2005-04-16 1479
^1da177e Linus Torvalds 2005-04-16 1480 *addr++ = 0x12345678;
^1da177e Linus Torvalds 2005-04-16 1481 *addr++ = caller;
^1da177e Linus Torvalds 2005-04-16 1482 *addr++ = smp_processor_id();
b8623975 Thomas Gleixner 2019-04-08 1483 size -= 3;
b8623975 Thomas Gleixner 2019-04-08 1484 #ifdef CONFIG_STACKTRACE
^1da177e Linus Torvalds 2005-04-16 1485 {
c79cc35c Thomas Gleixner 2019-04-14 1486 unsigned int nr_entries;
^1da177e Linus Torvalds 2005-04-16 1487
c79cc35c Thomas Gleixner 2019-04-14 1488 /* Leave one for the end marker below */
c79cc35c Thomas Gleixner 2019-04-14 1489 nr_entries = stack_trace_save(addr, size - 1, 3);
b8623975 Thomas Gleixner 2019-04-08 @1490 addr += trace.nr_entries;
^1da177e Linus Torvalds 2005-04-16 1491 }
b8623975 Thomas Gleixner 2019-04-08 1492 #endif
b8623975 Thomas Gleixner 2019-04-08 1493 *addr = 0x87654321;
^1da177e Linus Torvalds 2005-04-16 1494 }
40b44137 Joonsoo Kim 2016-03-15 1495

:::::: The code at line 1490 was first introduced by commit
:::::: b86239751f8c4d6fc43f6a9eca29e77b0319f5d7 mm/slab: Fix broken stack trace storage

:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>

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