Messages in this thread | | | Date | Wed, 28 Jul 2021 10:46:27 +0100 | From | Luis Henriques <> | Subject | Re: [linux-stable-rc:linux-4.9.y 9976/9999] fs/ceph/caps.o: warning: objtool: handle_cap_grant() falls through to next function ceph_add_cap.cold() |
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On Wed, Jul 28, 2021 at 05:13:28AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y > head: 8da69d43f5d3f7f8787117ee78cfc4060c4c0d29 > commit: 05700fe421866f60f63fbb3a02852425a9bd9447 [9976/9999] libceph: allow ceph_buffer_put() to receive a NULL ceph_buffer > config: x86_64-randconfig-r021-20210725 (attached as .config) > compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0 > reproduce (this is a W=1 build): > # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=05700fe421866f60f63fbb3a02852425a9bd9447 > git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git > git fetch --no-tags linux-stable-rc linux-4.9.y > git checkout 05700fe421866f60f63fbb3a02852425a9bd9447 > # save the attached .config to linux build tree > mkdir build_dir > make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash LDFLAGS=-z max-page-size=0x200000 arch/x86/xen/ fs/ceph/ net/batman-adv/ net/ceph/ > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All warnings (new ones prefixed by >>): > > In file included from include/linux/ceph/ceph_fs.h:15, > from include/linux/ceph/types.h:10, > from include/linux/ceph/libceph.h:18, > from fs/ceph/super.h:18, > from fs/ceph/caps.c:11: > include/linux/ceph/msgr.h:66:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] > 66 | } __attribute__ ((packed)); > | ^ > fs/ceph/caps.c: In function '__send_cap': > fs/ceph/caps.c:1128:22: warning: variable 'dropping' set but not used [-Wunused-but-set-variable] > 1128 | int held, revoking, dropping, keep; > | ^~~~~~~~ > fs/ceph/caps.c: In function 'ceph_handle_caps': > fs/ceph/caps.c:3571:7: warning: variable 'osd_epoch_barrier' set but not used [-Wunused-but-set-variable] > 3571 | u32 osd_epoch_barrier; > | ^~~~~~~~~~~~~~~~~ > fs/ceph/caps.c:3570:19: warning: variable 'caller_gid' set but not used [-Wunused-but-set-variable] > 3570 | u32 caller_uid, caller_gid; > | ^~~~~~~~~~ > fs/ceph/caps.c:3570:7: warning: variable 'caller_uid' set but not used [-Wunused-but-set-variable] > 3570 | u32 caller_uid, caller_gid; > | ^~~~~~~~~~ > fs/ceph/caps.c:3569:7: warning: variable 'flush_tid' set but not used [-Wunused-but-set-variable] > 3569 | u64 flush_tid; > | ^~~~~~~~~ > fs/ceph/caps.o: warning: objtool: handle_cap_flushsnap_ack.constprop.0() falls through to next function __ceph_flush_snaps.cold() > >> fs/ceph/caps.o: warning: objtool: handle_cap_grant() falls through to next function ceph_add_cap.cold()
I'll be honest: I've no idea why this is happening and x86 assembly isn't my cup of tea. I wonder, however, why this is showing up now because commit 5c498950f730 has been released in v4.9.192 already.
Cheers, -- Luís
> -- > In file included from include/linux/ceph/ceph_fs.h:15, > from include/linux/ceph/types.h:10, > from include/linux/ceph/libceph.h:18, > from net/ceph/messenger.c:21: > include/linux/ceph/msgr.h:66:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] > 66 | } __attribute__ ((packed)); > | ^ > net/ceph/messenger.c: In function 'write_partial_message_data': > net/ceph/messenger.c:1570:8: warning: variable 'need_crc' set but not used [-Wunused-but-set-variable] > 1570 | bool need_crc; > | ^~~~~~~~ > In file included from include/linux/kernel.h:13, > from include/linux/list.h:8, > from include/linux/wait.h:6, > from include/linux/fs.h:5, > from include/linux/highmem.h:4, > from net/ceph/messenger.c:5: > net/ceph/messenger.c: In function 'ceph_sock_state_change': > include/linux/printk.h:123:2: warning: this statement may fall through [-Wimplicit-fallthrough=] > 123 | 0; \ > | ^ > include/linux/printk.h:315:2: note: in expansion of macro 'no_printk' > 315 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) > | ^~~~~~~~~ > include/linux/ceph/ceph_debug.h:34:25: note: in expansion of macro 'pr_debug' > 34 | # define dout(fmt, ...) pr_debug(" " fmt, ##__VA_ARGS__) > | ^~~~~~~~ > net/ceph/messenger.c:431:3: note: in expansion of macro 'dout' > 431 | dout("%s TCP_CLOSE\n", __func__); > | ^~~~ > net/ceph/messenger.c:432:2: note: here > 432 | case TCP_CLOSE_WAIT: > | ^~~~ > arch/x86/include/asm/bitops.h: Assembler messages: > arch/x86/include/asm/bitops.h:206: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' > arch/x86/include/asm/bitops.h:252: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' > >> net/ceph/messenger.o: warning: objtool: ceph_msg_release() falls through to next function ceph_msg_new.cold() > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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