The patch titled
Subject: perf/core: use vma_is_initial_stack() and vma_is_initial_heap()
has been added to the -mm mm-unstable branch. Its filename is
perf-core-use-vma_is_initial_stack-and-vma_is_initial_heap.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/perf-core-use-vma_is_initial_stack-and-vma_is_initial_heap.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: perf/core: use vma_is_initial_stack() and vma_is_initial_heap()
Date: Fri, 28 Jul 2023 13:00:43 +0800
Use the helpers to simplify code, also kill unneeded goto cpy_name.
Link: https://lkml.kernel.org/r/20230728050043.59880-5-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
Cc: "Christian König" <christian.koenig@xxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxxx>
Cc: Eric Paris <eparis@xxxxxxxxxxxxxx>
Cc: Felix Kuehling <felix.kuehling@xxxxxxx>
Cc: "Pan, Xinhui" <Xinhui.Pan@xxxxxxx>
Cc: Paul Moore <paul@xxxxxxxxxxxxxx>
Cc: Stephen Smalley <stephen.smalley.work@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/events/core.c | 33 +++++++++++----------------------
1 file changed, 11 insertions(+), 22 deletions(-)
--- a/kernel/events/core.c~perf-core-use-vma_is_initial_stack-and-vma_is_initial_heap
+++ a/kernel/events/core.c
@@ -8631,7 +8631,7 @@ static void perf_event_mmap_event(struct
unsigned int size;
char tmp[16];
char *buf = NULL;
- char *name;
+ char *name = NULL;
if (vma->vm_flags & VM_READ)
prot |= PROT_READ;
@@ -8678,29 +8678,18 @@ static void perf_event_mmap_event(struct
goto got_name;
} else {
- if (vma->vm_ops && vma->vm_ops->name) {
+ if (vma->vm_ops && vma->vm_ops->name)
name = (char *) vma->vm_ops->name(vma);
- if (name)
- goto cpy_name;
+ if (!name)
+ name = (char *)arch_vma_name(vma);
+ if (!name) {
+ if (vma_is_initial_heap(vma))
+ name = "[heap]";
+ else if (vma_is_initial_stack(vma))
+ name = "[stack]";
+ else
+ name = "//anon";
}
-
- name = (char *)arch_vma_name(vma);
- if (name)
- goto cpy_name;
-
- if (vma->vm_start <= vma->vm_mm->start_brk &&
- vma->vm_end >= vma->vm_mm->brk) {
- name = "[heap]";
- goto cpy_name;
- }
- if (vma->vm_start <= vma->vm_mm->start_stack &&
- vma->vm_end >= vma->vm_mm->start_stack) {
- name = "[stack]";
- goto cpy_name;
- }
-
- name = "//anon";
- goto cpy_name;
}
cpy_name:
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
mm-remove-arguments-of-show_mem.patch
mm-make-show_free_areas-static.patch
mm-factor-out-vma-stack-and-heap-checks.patch
drm-amdkfd-use-vma_is_initial_stack-and-vma_is_initial_heap.patch
selinux-use-vma_is_initial_stack-and-vma_is_initial_heap.patch
perf-core-use-vma_is_initial_stack-and-vma_is_initial_heap.patch
