# git rev-parse -q --verify fedb8da96355f5f64353625bf96dc69423ad1826^{commit}
fedb8da96355f5f64353625bf96dc69423ad1826
already have revision, skipping fetch
# git checkout -q -f -B kisskb fedb8da96355f5f64353625bf96dc69423ad1826
# git clean -qxdf
# < git log -1
# commit fedb8da96355f5f64353625bf96dc69423ad1826
# Author: John David Anglin <dave.anglin@bell.net>
# Date:   Sun Aug 5 13:30:31 2018 -0400
# 
#     parisc: Define mb() and add memory barriers to assembler unlock sequences
#     
#     For years I thought all parisc machines executed loads and stores in
#     order. However, Jeff Law recently indicated on gcc-patches that this is
#     not correct. There are various degrees of out-of-order execution all the
#     way back to the PA7xxx processor series (hit-under-miss). The PA8xxx
#     series has full out-of-order execution for both integer operations, and
#     loads and stores.
#     
#     This is described in the following article:
#     http://web.archive.org/web/20040214092531/http://www.cpus.hp.com/technical_references/advperf.shtml
#     
#     For this reason, we need to define mb() and to insert a memory barrier
#     before the store unlocking spinlocks. This ensures that all memory
#     accesses are complete prior to unlocking. The ldcw instruction performs
#     the same function on entry.
#     
#     Signed-off-by: John David Anglin <dave.anglin@bell.net>
#     Cc: stable@vger.kernel.org # 4.0+
#     Signed-off-by: Helge Deller <deller@gmx.de>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < git log --format=%s --max-count=1 fedb8da96355f5f64353625bf96dc69423ad1826
# < make -s -j 40 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# make -s -j 40 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/crypto/ablkcipher.c: In function 'crypto_ablkcipher_report':
/kisskb/src/crypto/ablkcipher.c:374:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation]
  strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<default>",
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sizeof(rblkcipher.geniv));
   ~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/crypto/ablkcipher.c: In function 'crypto_givcipher_report':
/kisskb/src/crypto/ablkcipher.c:448:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation]
  strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<built-in>",
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sizeof(rblkcipher.geniv));
   ~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/crypto/blkcipher.c: In function 'crypto_blkcipher_report':
/kisskb/src/crypto/blkcipher.c:513:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation]
  strncpy(rblkcipher.geniv, alg->cra_blkcipher.geniv ?: "<default>",
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sizeof(rblkcipher.geniv));
   ~~~~~~~~~~~~~~~~~~~~~~~~~
In function 'kernfs_get_target_path',
    inlined from 'kernfs_getlink.isra.2' at /kisskb/src/fs/kernfs/symlink.c:109:10,
    inlined from 'kernfs_iop_get_link.part.3' at /kisskb/src/fs/kernfs/symlink.c:127:10,
    inlined from 'kernfs_iop_get_link':
/kisskb/src/fs/kernfs/symlink.c:91:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
   strncpy(s + len, kn->name, slen);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/fs/kernfs/symlink.c: In function 'kernfs_iop_get_link':
/kisskb/src/fs/kernfs/symlink.c:88:14: note: length computed here
   int slen = strlen(kn->name);
              ^~~~~~~~~~~~~~~~
/kisskb/src/fs/ext4/super.c: In function '__save_error_info':
/kisskb/src/fs/ext4/super.c:326:2: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
  strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func));
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/fs/ext4/super.c:330:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(es->s_first_error_func, func,
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    sizeof(es->s_first_error_func));
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/include/trace/define_trace.h:97,
                 from /kisskb/src/include/trace/events/writeback.h:762,
                 from /kisskb/src/fs/fs-writeback.c:98:
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_work_class':
/kisskb/src/include/trace/events/writeback.h:223:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    wb->bdi->dev ? dev_name(wb->bdi->dev) : "(unknown)", 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:222:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_class':
/kisskb/src/include/trace/events/writeback.h:277:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:276:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_bdi_register':
/kisskb/src/include/trace/events/writeback.h:299:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:292:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_bdi_register,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:298:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_wbc_class':
/kisskb/src/include/trace/events/writeback.h:324:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:323:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_queue_io':
/kisskb/src/include/trace/events/writeback.h:375:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:360:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_queue_io,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:373:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_write_inode_template':
/kisskb/src/include/trace/events/writeback.h:179:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    dev_name(inode_to_bdi(inode)->dev), 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:178:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_dirty_inode_template':
/kisskb/src/include/trace/events/writeback.h:99:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    bdi->dev ? dev_name(bdi->dev) : "(unknown)", 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:95:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_single_inode_template':
/kisskb/src/include/trace/events/writeback.h:660:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    dev_name(inode_to_bdi(inode)->dev), 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:659:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_dirty_page':
/kisskb/src/include/trace/events/writeback.h:69:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:56:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_dirty_page,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:68:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'perf_trace_writeback_sb_inodes_requeue':
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
In file included from /kisskb/src/include/trace/define_trace.h:96,
                 from /kisskb/src/include/trace/events/writeback.h:762,
                 from /kisskb/src/fs/fs-writeback.c:98:
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_bdi_register':
/kisskb/src/include/trace/events/writeback.h:299:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:292:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_bdi_register,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:298:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_class':
/kisskb/src/include/trace/events/writeback.h:277:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:276:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_wbc_class':
/kisskb/src/include/trace/events/writeback.h:324:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:323:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_write_inode_template':
/kisskb/src/include/trace/events/writeback.h:179:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    dev_name(inode_to_bdi(inode)->dev), 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:178:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_dirty_inode_template':
/kisskb/src/include/trace/events/writeback.h:99:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    bdi->dev ? dev_name(bdi->dev) : "(unknown)", 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:95:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_work_class':
/kisskb/src/include/trace/events/writeback.h:223:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    wb->bdi->dev ? dev_name(wb->bdi->dev) : "(unknown)", 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:222:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_dirty_page':
/kisskb/src/include/trace/events/writeback.h:69:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:56:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_dirty_page,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:68:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_queue_io':
/kisskb/src/include/trace/events/writeback.h:375:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:360:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_queue_io,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:373:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_single_inode_template':
/kisskb/src/include/trace/events/writeback.h:660:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
    dev_name(inode_to_bdi(inode)->dev), 32);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/events/writeback.h:659:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h: In function 'trace_event_raw_event_writeback_sb_inodes_requeue':
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:586:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(__entry->name,
   ^~~~~~~~~~~~~~~~~~~~~~
           dev_name(inode_to_bdi(inode)->dev), 32);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/include/trace/trace_events.h:720:4: note: in definition of macro 'DECLARE_EVENT_CLASS'
  { assign; }       \
    ^~~~~~
/kisskb/src/include/trace/trace_events.h:78:9: note: in expansion of macro 'PARAMS'
         PARAMS(assign),         \
         ^~~~~~
/kisskb/src/include/trace/events/writeback.h:572:1: note: in expansion of macro 'TRACE_EVENT'
 TRACE_EVENT(writeback_sb_inodes_requeue,
 ^~~~~~~~~~~
/kisskb/src/include/trace/events/writeback.h:585:2: note: in expansion of macro 'TP_fast_assign'
  TP_fast_assign(
  ^~~~~~~~~~~~~~
In function 'fill_kobj_path',
    inlined from 'kobject_get_path' at /kisskb/src/lib/kobject.c:155:2:
/kisskb/src/lib/kobject.c:128:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
   strncpy(path + length, kobject_name(parent), cur);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/lib/kobject.c: In function 'kobject_get_path':
/kisskb/src/lib/kobject.c:125:13: note: length computed here
   int cur = strlen(kobject_name(parent));
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/video/hdmi.c: In function 'hdmi_spd_infoframe_init':
/kisskb/src/drivers/video/hdmi.c:174:2: warning: 'strncpy' specified bound 8 equals destination size [-Wstringop-truncation]
  strncpy(frame->vendor, vendor, sizeof(frame->vendor));
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/video/hdmi.c:175:2: warning: 'strncpy' specified bound 16 equals destination size [-Wstringop-truncation]
  strncpy(frame->product, product, sizeof(frame->product));
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/linus_x86_64_defconfig_x86_64-gcc8
# Build took: 0:01:02.980725