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SubjectRe: [PATCH V3 4/6] x86/intel_rdt: Create required perf event attributes
Hi Reinette,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/x86/core]
[also build test ERROR on v4.19-rc3 next-20180911]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Reinette-Chatre/perf-core-and-x86-intel_rdt-Fix-lack-of-coordination-with-perf/20180912-101526
config: i386-randconfig-x0-09121359 (attached as .config)
compiler: gcc-5 (Debian 5.5.0-3) 5.4.1 20171010
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

Note: the linux-review/Reinette-Chatre/perf-core-and-x86-intel_rdt-Fix-lack-of-coordination-with-perf/20180912-101526 HEAD b684b8727deb9e3cf635badb292b3314904d17b2 builds fine.
It only hurts bisectibility.

All errors (new ones prefixed by >>):

arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:927:15: error: variable 'perf_miss_attr' has initializer but incomplete type
static struct perf_event_attr __attribute__((unused)) perf_miss_attr = {
^
>> arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:928:2: error: unknown field 'type' specified in initializer
.type = PERF_TYPE_RAW,
^
>> arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:928:11: error: 'PERF_TYPE_RAW' undeclared here (not in a function)
.type = PERF_TYPE_RAW,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:928:11: warning: excess elements in struct initializer
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:928:11: note: (near initialization for 'perf_miss_attr')
>> arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:929:2: error: unknown field 'size' specified in initializer
.size = sizeof(struct perf_event_attr),
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:929:18: error: invalid application of 'sizeof' to incomplete type 'struct perf_event_attr'
.size = sizeof(struct perf_event_attr),
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:929:11: warning: excess elements in struct initializer
.size = sizeof(struct perf_event_attr),
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:929:11: note: (near initialization for 'perf_miss_attr')
>> arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:930:2: error: unknown field 'pinned' specified in initializer
.pinned = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:930:13: warning: excess elements in struct initializer
.pinned = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:930:13: note: (near initialization for 'perf_miss_attr')
>> arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:931:2: error: unknown field 'disabled' specified in initializer
.disabled = 0,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:931:14: warning: excess elements in struct initializer
.disabled = 0,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:931:14: note: (near initialization for 'perf_miss_attr')
>> arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:932:2: error: unknown field 'exclude_user' specified in initializer
.exclude_user = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:932:18: warning: excess elements in struct initializer
.exclude_user = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:932:18: note: (near initialization for 'perf_miss_attr')
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:935:15: error: variable 'perf_hit_attr' has initializer but incomplete type
static struct perf_event_attr __attribute__((unused)) perf_hit_attr = {
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:936:2: error: unknown field 'type' specified in initializer
.type = PERF_TYPE_RAW,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:936:11: warning: excess elements in struct initializer
.type = PERF_TYPE_RAW,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:936:11: note: (near initialization for 'perf_hit_attr')
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:937:2: error: unknown field 'size' specified in initializer
.size = sizeof(struct perf_event_attr),
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:937:18: error: invalid application of 'sizeof' to incomplete type 'struct perf_event_attr'
.size = sizeof(struct perf_event_attr),
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:937:11: warning: excess elements in struct initializer
.size = sizeof(struct perf_event_attr),
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:937:11: note: (near initialization for 'perf_hit_attr')
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:938:2: error: unknown field 'pinned' specified in initializer
.pinned = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:938:13: warning: excess elements in struct initializer
.pinned = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:938:13: note: (near initialization for 'perf_hit_attr')
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:939:2: error: unknown field 'disabled' specified in initializer
.disabled = 0,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:939:14: warning: excess elements in struct initializer
.disabled = 0,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:939:14: note: (near initialization for 'perf_hit_attr')
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:940:2: error: unknown field 'exclude_user' specified in initializer
.exclude_user = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:940:18: warning: excess elements in struct initializer
.exclude_user = 1,
^
arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c:940:18: note: (near initialization for 'perf_hit_attr')

vim +/type +928 arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c

917
918 /*
919 * Create a perf_event_attr for the hit and miss perf events that will
920 * be used during the performance measurement. A perf_event maintains
921 * a pointer to its perf_event_attr so a unique attribute structure is
922 * created for each perf_event.
923 *
924 * The actual configuration of the event is set right before use in order
925 * to use the X86_CONFIG macro.
926 */
> 927 static struct perf_event_attr __attribute__((unused)) perf_miss_attr = {
> 928 .type = PERF_TYPE_RAW,
> 929 .size = sizeof(struct perf_event_attr),
> 930 .pinned = 1,
> 931 .disabled = 0,
> 932 .exclude_user = 1,
933 };
934

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