The following commit has been merged into the perf/core branch of tip: Commit-ID: 90583af61d0c0d2826f42a297a03645b35c49085 Gitweb: https://git.kernel.org/tip/90583af61d0c0d2826f42a297a03645b35c49085 Author: Alexander Shishkin <alexander.shish...@linux.intel.com> AuthorDate: Wed, 21 Aug 2019 15:47:22 +03:00 Committer: Ingo Molnar <mi...@kernel.org> CommitterDate: Mon, 26 Aug 2019 12:00:12 +02:00
perf/x86/intel/pt: Clean up ToPA allocation path Some of the allocation parameters are passed as function arguments, while the CPU number for per-cpu allocation is passed via the buffer object. There's no reason for this. Pass the CPU as a function argument instead. Signed-off-by: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Arnaldo Carvalho de Melo <a...@redhat.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Stephane Eranian <eran...@google.com> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Vince Weaver <vincent.wea...@maine.edu> Link: http://lkml.kernel.org/r/20190821124727.73310-2-alexander.shish...@linux.intel.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/events/intel/pt.c | 15 +++++++-------- arch/x86/events/intel/pt.h | 2 -- 2 files changed, 7 insertions(+), 10 deletions(-) diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c index d3dc227..9d9258f 100644 --- a/arch/x86/events/intel/pt.c +++ b/arch/x86/events/intel/pt.c @@ -670,7 +670,7 @@ static bool topa_table_full(struct topa *topa) * * Return: 0 on success or error code. */ -static int topa_insert_pages(struct pt_buffer *buf, gfp_t gfp) +static int topa_insert_pages(struct pt_buffer *buf, int cpu, gfp_t gfp) { struct topa *topa = buf->last; int order = 0; @@ -681,7 +681,7 @@ static int topa_insert_pages(struct pt_buffer *buf, gfp_t gfp) order = page_private(p); if (topa_table_full(topa)) { - topa = topa_alloc(buf->cpu, gfp); + topa = topa_alloc(cpu, gfp); if (!topa) return -ENOMEM; @@ -1061,20 +1061,20 @@ static void pt_buffer_fini_topa(struct pt_buffer *buf) * @size: Total size of all regions within this ToPA. * @gfp: Allocation flags. */ -static int pt_buffer_init_topa(struct pt_buffer *buf, unsigned long nr_pages, - gfp_t gfp) +static int pt_buffer_init_topa(struct pt_buffer *buf, int cpu, + unsigned long nr_pages, gfp_t gfp) { struct topa *topa; int err; - topa = topa_alloc(buf->cpu, gfp); + topa = topa_alloc(cpu, gfp); if (!topa) return -ENOMEM; topa_insert_table(buf, topa); while (buf->nr_pages < nr_pages) { - err = topa_insert_pages(buf, gfp); + err = topa_insert_pages(buf, cpu, gfp); if (err) { pt_buffer_fini_topa(buf); return -ENOMEM; @@ -1124,13 +1124,12 @@ pt_buffer_setup_aux(struct perf_event *event, void **pages, if (!buf) return NULL; - buf->cpu = cpu; buf->snapshot = snapshot; buf->data_pages = pages; INIT_LIST_HEAD(&buf->tables); - ret = pt_buffer_init_topa(buf, nr_pages, GFP_KERNEL); + ret = pt_buffer_init_topa(buf, cpu, nr_pages, GFP_KERNEL); if (ret) { kfree(buf); return NULL; diff --git a/arch/x86/events/intel/pt.h b/arch/x86/events/intel/pt.h index 63fe406..8de8ed0 100644 --- a/arch/x86/events/intel/pt.h +++ b/arch/x86/events/intel/pt.h @@ -53,7 +53,6 @@ struct pt_pmu { /** * struct pt_buffer - buffer configuration; one buffer per task_struct or * cpu, depending on perf event configuration - * @cpu: cpu for per-cpu allocation * @tables: list of ToPA tables in this buffer * @first: shorthand for first topa table * @last: shorthand for last topa table @@ -71,7 +70,6 @@ struct pt_pmu { * @topa_index: table of topa entries indexed by page offset */ struct pt_buffer { - int cpu; struct list_head tables; struct topa *first, *last, *cur; unsigned int cur_idx;
