tree: https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next head: b93f980e5c9e057254d694c388daef774e717729 commit: 10d807b74cef508e163e7ae622321f5d6ae866df [18/27] dm cache: fix race condition in the writeback mode overwrite_bio optimisation config: i386-randconfig-x019-201745 (attached as .config) compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026 reproduce: git checkout 10d807b74cef508e163e7ae622321f5d6ae866df # save the attached .config to linux build tree make ARCH=i386
All errors (new ones prefixed by >>):
drivers//md/dm-cache-target.c: In function 'mg_full_copy':
>> drivers//md/dm-cache-target.c:1441:19: error: 'ws' undeclared (first use in
>> this function)
mg_upgrade_lock(ws);
^~
drivers//md/dm-cache-target.c:1441:19: note: each undeclared identifier is
reported only once for each function it appears in
In file included from include/linux/linkage.h:4:0,
from include/linux/fs.h:4,
from drivers//md/dm.h:13,
from drivers//md/dm-cache-target.c:7:
drivers//md/dm-cache-target.c: At top level:
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'strcpy' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:421:2: note: in expansion of macro 'if'
if (p_size == (size_t)-1 && q_size == (size_t)-1)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'kmemdup' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:411:2: note: in expansion of macro 'if'
if (p_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'kmemdup' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:409:2: note: in expansion of macro 'if'
if (__builtin_constant_p(size) && p_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memchr_inv' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:400:2: note: in expansion of macro 'if'
if (p_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memchr_inv' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:398:2: note: in expansion of macro 'if'
if (__builtin_constant_p(size) && p_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memchr' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:389:2: note: in expansion of macro 'if'
if (p_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memchr' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:387:2: note: in expansion of macro 'if'
if (__builtin_constant_p(size) && p_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memcmp' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:379:2: note: in expansion of macro 'if'
if (p_size < size || q_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memcmp' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:376:3: note: in expansion of macro 'if'
if (q_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memcmp' which is not static
______f = { \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^~~~~~~~~~
include/linux/string.h:374:3: note: in expansion of macro 'if'
if (p_size < size)
^~
include/linux/compiler.h:162:4: warning: '______f' is static but declared in
inline function 'memcmp' which is not static
______f = { \
vim +/ws +1441 drivers//md/dm-cache-target.c
c6b4fcba Joe Thornber 2013-03-01 1432
10d807b7 Joe Thornber 2017-11-10 1433 static void mg_full_copy(struct
dm_cache_migration *mg)
c6b4fcba Joe Thornber 2013-03-01 1434 {
b29d4986 Joe Thornber 2016-12-15 1435 struct cache *cache = mg->cache;
b29d4986 Joe Thornber 2016-12-15 1436 struct policy_work *op = mg->op;
b29d4986 Joe Thornber 2016-12-15 1437 bool is_policy_promote =
(op->op == POLICY_PROMOTE);
c6b4fcba Joe Thornber 2013-03-01 1438
b29d4986 Joe Thornber 2016-12-15 1439 if ((!is_policy_promote &&
!is_dirty(cache, op->cblock)) ||
b29d4986 Joe Thornber 2016-12-15 1440 is_discarded_oblock(cache,
op->oblock)) {
b29d4986 Joe Thornber 2016-12-15 @1441 mg_upgrade_lock(ws);
c6b4fcba Joe Thornber 2013-03-01 1442 return;
b29d4986 Joe Thornber 2016-12-15 1443 }
c6b4fcba Joe Thornber 2013-03-01 1444
b29d4986 Joe Thornber 2016-12-15 1445 init_continuation(&mg->k,
mg_upgrade_lock);
c6b4fcba Joe Thornber 2013-03-01 1446
10d807b7 Joe Thornber 2017-11-10 1447 if (copy(mg,
is_policy_promote)) {
b29d4986 Joe Thornber 2016-12-15 1448 DMERR_LIMIT("%s:
migration copy failed", cache_device_name(cache));
4e4cbee9 Christoph Hellwig 2017-06-03 1449 mg->k.input =
BLK_STS_IOERR;
b29d4986 Joe Thornber 2016-12-15 1450 mg_complete(mg, false);
b29d4986 Joe Thornber 2016-12-15 1451 }
c6b4fcba Joe Thornber 2013-03-01 1452 }
10d807b7 Joe Thornber 2017-11-10 1453
:::::: The code at line 1441 was first introduced by commit
:::::: b29d4986d0da1a27cd35917cdb433672f5c95d7f dm cache: significant rework to
leverage dm-bio-prison-v2
:::::: TO: Joe Thornber <[email protected]>
:::::: CC: Mike Snitzer <[email protected]>
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