From: kbuild test robot <fengguang.wu@intel.com>
To: Anju T <anju@linux.vnet.ibm.com>
Cc: kbuild-all@01.org, linuxppc-dev@lists.ozlabs.org,
Michael Ellerman <mpe@ellerman.id.au>,
"Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
Subject: [powerpc:test 26/49] arch/powerpc/include/asm/kprobes.h:79:16: error: 'MODULE_NAME_LEN' undeclared
Date: Tue, 31 Jan 2017 06:42:28 +0800 [thread overview]
Message-ID: <201701310605.C5dllvUr%fengguang.wu@intel.com> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git test
head: 675b1ff3778df243879ed2c58dfa80aeb1f9bf03
commit: ad581fb0a5d8a5a505a85e03a87ef14b8defa072 [26/49] powerpc/kprobes: Implement Optprobes
config: powerpc-allmodconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout ad581fb0a5d8a5a505a85e03a87ef14b8defa072
# save the attached .config to linux build tree
make.cross ARCH=powerpc
All error/warnings (new ones prefixed by >>):
In file included from include/linux/kprobes.h:45:0,
from arch/powerpc/kernel/optprobes.c:12:
arch/powerpc/kernel/optprobes.c: In function 'arch_prepare_optimized_kprobe':
>> arch/powerpc/include/asm/kprobes.h:79:16: error: 'MODULE_NAME_LEN' undeclared (first use in this function)
char dot_name[MODULE_NAME_LEN + 1 + KSYM_NAME_LEN]; \
^
>> arch/powerpc/kernel/optprobes.c:230:2: note: in expansion of macro 'kprobe_lookup_name'
kprobe_lookup_name("optimized_callback", op_callback_addr);
^~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/kprobes.h:79:16: note: each undeclared identifier is reported only once for each function it appears in
char dot_name[MODULE_NAME_LEN + 1 + KSYM_NAME_LEN]; \
^
>> arch/powerpc/kernel/optprobes.c:230:2: note: in expansion of macro 'kprobe_lookup_name'
kprobe_lookup_name("optimized_callback", op_callback_addr);
^~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/kprobes.h:82:14: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
if ((modsym = strchr(name, ':')) != NULL) { \
^
>> arch/powerpc/kernel/optprobes.c:230:2: note: in expansion of macro 'kprobe_lookup_name'
kprobe_lookup_name("optimized_callback", op_callback_addr);
^~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/kprobes.h:79:7: warning: unused variable 'dot_name' [-Wunused-variable]
char dot_name[MODULE_NAME_LEN + 1 + KSYM_NAME_LEN]; \
^
>> arch/powerpc/kernel/optprobes.c:230:2: note: in expansion of macro 'kprobe_lookup_name'
kprobe_lookup_name("optimized_callback", op_callback_addr);
^~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/kprobes.h:82:14: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
if ((modsym = strchr(name, ':')) != NULL) { \
^
arch/powerpc/kernel/optprobes.c:231:2: note: in expansion of macro 'kprobe_lookup_name'
kprobe_lookup_name("emulate_step", emulate_step_addr);
^~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/kprobes.h:79:7: warning: unused variable 'dot_name' [-Wunused-variable]
char dot_name[MODULE_NAME_LEN + 1 + KSYM_NAME_LEN]; \
^
arch/powerpc/kernel/optprobes.c:231:2: note: in expansion of macro 'kprobe_lookup_name'
kprobe_lookup_name("emulate_step", emulate_step_addr);
^~~~~~~~~~~~~~~~~~
vim +/MODULE_NAME_LEN +79 arch/powerpc/include/asm/kprobes.h
bf794bf5 Naveen N. Rao 2014-12-15 73 *
bf794bf5 Naveen N. Rao 2014-12-15 74 * This ensures we always get to the actual symbol and not the descriptor.
bf794bf5 Naveen N. Rao 2014-12-15 75 * Also handle <module:symbol> format.
bf794bf5 Naveen N. Rao 2014-12-15 76 */
bf794bf5 Naveen N. Rao 2014-12-15 77 #define kprobe_lookup_name(name, addr) \
bf794bf5 Naveen N. Rao 2014-12-15 78 { \
bf794bf5 Naveen N. Rao 2014-12-15 @79 char dot_name[MODULE_NAME_LEN + 1 + KSYM_NAME_LEN]; \
bf794bf5 Naveen N. Rao 2014-12-15 80 char *modsym; \
bf794bf5 Naveen N. Rao 2014-12-15 81 bool dot_appended = false; \
bf794bf5 Naveen N. Rao 2014-12-15 @82 if ((modsym = strchr(name, ':')) != NULL) { \
bf794bf5 Naveen N. Rao 2014-12-15 83 modsym++; \
bf794bf5 Naveen N. Rao 2014-12-15 84 if (*modsym != '\0' && *modsym != '.') { \
bf794bf5 Naveen N. Rao 2014-12-15 85 /* Convert to <module:.symbol> */ \
:::::: The code at line 79 was first introduced by commit
:::::: bf794bf52a80c6278a028f0af2ca32d7c3508c9b powerpc/kprobes: Fix kallsyms lookup across powerpc ABIv1 and ABIv2
:::::: TO: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>
---
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