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-maple_defconfig (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 errors (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: error: assignment discards 'const'
>> qualifier from pointer target type [-Werror=discarded-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: error: unused variable 'dot_name'
>> [-Werror=unused-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: error: assignment discards 'const'
>> qualifier from pointer target type [-Werror=discarded-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: error: unused variable 'dot_name'
>> [-Werror=unused-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);
^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
vim +/const +82 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 82 was first introduced by commit
:::::: bf794bf52a80c6278a028f0af2ca32d7c3508c9b powerpc/kprobes: Fix kallsyms
lookup across powerpc ABIv1 and ABIv2
:::::: TO: Naveen N. Rao <naveen.n....@linux.vnet.ibm.com>
:::::: CC: Michael Ellerman <m...@ellerman.id.au>
---
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https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
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