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powerpc/papr_scm: Fix build failure when

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The following build failure occurs when CONFIG_PERF_EVENTS is not set
as generic pmu functions are not visible in that scenario.

arch/powerpc/platforms/pseries/papr_scm.c:372:35: error: ‘struct perf_event’ has no member named ‘attr’
         p->nvdimm_events_map[event->attr.config],
                                   ^~
In file included from ./include/linux/list.h:5,
                 from ./include/linux/kobject.h:19,
                 from ./include/linux/of.h:17,
                 from arch/powerpc/platforms/pseries/papr_scm.c:5:
arch/powerpc/platforms/pseries/papr_scm.c: In function ‘papr_scm_pmu_event_init’:
arch/powerpc/platforms/pseries/papr_scm.c:389:49: error: ‘struct perf_event’ has no member named ‘pmu’
  struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu);
                                                 ^~
./include/linux/container_of.h:18:26: note: in definition of macro ‘container_of’
  void *__mptr = (void *)(ptr);     \
                          ^~~
arch/powerpc/platforms/pseries/papr_scm.c:389:30: note: in expansion of macro ‘to_nvdimm_pmu’
  struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu);
                              ^~~~~~~~~~~~~
In file included from ./include/linux/bits.h:22,
                 from ./include/linux/bitops.h:6,
                 from ./include/linux/of.h:15,
                 from arch/powerpc/platforms/pseries/papr_scm.c:5:

Fix the build issue by adding check for CONFIG_PERF_EVENTS config option
and also add stub function for papr_scm_pmu_register to handle
the CONFIG_PERF_EVENTS=n case. Also move the position of macro
"to_nvdimm_pmu" inorder to merge it in CONFIG_PERF_EVENTS=y block.

based on libnvdimm-for-next tree)

Fixes: 4c08d4bbc0 ("powerpc/papr_scm: Add perf interface support") (Commit id
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Link: https://lore.kernel.org/r/20220323164550.109768-2-kjain@linux.ibm.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Kajol Jain 2022-03-23 22:15:50 +05:30 committed by Dan Williams
parent de7a9e949f
commit d0007eb15c
1 changed files with 7 additions and 2 deletions
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9
arch/powerpc/platforms/pseries/papr_scm.c
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@ -69,8 +69,6 @@
#define PAPR_SCM_PERF_STATS_EYECATCHER __stringify(SCMSTATS)
#define PAPR_SCM_PERF_STATS_VERSION 0x1
#define to_nvdimm_pmu(_pmu) container_of(_pmu, struct nvdimm_pmu, pmu)
/* Struct holding a single performance metric */
struct papr_scm_perf_stat {
u8 stat_id[8];
@ -346,6 +344,9 @@ static ssize_t drc_pmem_query_stats(struct papr_scm_priv *p,
return 0;
}
#ifdef CONFIG_PERF_EVENTS
#define to_nvdimm_pmu(_pmu) container_of(_pmu, struct nvdimm_pmu, pmu)
static int papr_scm_pmu_get_value(struct perf_event *event, struct device *dev, u64 *count)
{
struct papr_scm_perf_stat *stat;
@ -558,6 +559,10 @@ pmu_err_print:
dev_info(&p->pdev->dev, "nvdimm pmu didn't register rc=%d\n", rc);
}
#else
static void papr_scm_pmu_register(struct papr_scm_priv *p) { }
#endif
/*
* Issue hcall to retrieve dimm health info and populate papr_scm_priv with the
* health information.