[RFC PATCH v1 04/37] perf util: add mmap_cpu_mask__duplicate function
From: Riccardo Mancini <hidden>
Date: 2021-08-21 09:20:04
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
This patch adds a new function in util/mmap.c to duplicate a mmap_cpu_mask. This new function will be used in the following patches. Signed-off-by: Riccardo Mancini <redacted> --- tools/perf/util/mmap.c | 12 ++++++++++++ tools/perf/util/mmap.h | 3 +++ 2 files changed, 15 insertions(+)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index ab7108d22428b527..9e9a447682cc962c 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c@@ -350,3 +350,15 @@ int perf_mmap__push(struct mmap *md, void *to, out: return rc; } + +int mmap_cpu_mask__duplicate(struct mmap_cpu_mask *original, + struct mmap_cpu_mask *clone) +{ + clone->nbits = original->nbits; + clone->bits = bitmap_alloc(original->nbits); + if (!clone->bits) + return -ENOMEM; + + memcpy(clone->bits, original->bits, MMAP_CPU_MASK_BYTES(original)); + return 0; +}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 9d5f589f02ae70e1..b4923e587fd7749c 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h@@ -63,4 +63,7 @@ size_t mmap__mmap_len(struct mmap *map); void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag); +int mmap_cpu_mask__duplicate(struct mmap_cpu_mask *original, + struct mmap_cpu_mask *clone); + #endif /*__PERF_MMAP_H */
--
2.31.1