The patch titled
Subject: kernel/profile.c: simplify duplicated code in profile_setup()
has been added to the -mm mm-nonmm-unstable branch. Its filename is
profile-simplify-redundant-code-in-profile_setup.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/profile-simplify-redundant-code-in-profile_setup.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: wuchi <wuchi.zero@xxxxxxxxx>
Subject: kernel/profile.c: simplify duplicated code in profile_setup()
Date: Thu, 1 Sep 2022 08:31:21 +0800
The code to parse option string "schedule/sleep/kvm" of cmdline in
function profile_setup is redundant, so simplify that.
Link: https://lkml.kernel.org/r/20220901003121.53597-1-wuchi.zero@xxxxxxxxx
Signed-off-by: wuchi <wuchi.zero@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/profile.c | 32 ++++++++++++++------------------
1 file changed, 14 insertions(+), 18 deletions(-)
--- a/kernel/profile.c~profile-simplify-redundant-code-in-profile_setup
+++ a/kernel/profile.c
@@ -59,43 +59,39 @@ int profile_setup(char *str)
static const char schedstr[] = "schedule";
static const char sleepstr[] = "sleep";
static const char kvmstr[] = "kvm";
+ const char *select = NULL;
int par;
if (!strncmp(str, sleepstr, strlen(sleepstr))) {
#ifdef CONFIG_SCHEDSTATS
force_schedstat_enabled();
prof_on = SLEEP_PROFILING;
- if (str[strlen(sleepstr)] == ',')
- str += strlen(sleepstr) + 1;
- if (get_option(&str, &par))
- prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
- pr_info("kernel sleep profiling enabled (shift: %u)\n",
- prof_shift);
+ select = sleepstr;
#else
pr_warn("kernel sleep profiling requires CONFIG_SCHEDSTATS\n");
#endif /* CONFIG_SCHEDSTATS */
} else if (!strncmp(str, schedstr, strlen(schedstr))) {
prof_on = SCHED_PROFILING;
- if (str[strlen(schedstr)] == ',')
- str += strlen(schedstr) + 1;
- if (get_option(&str, &par))
- prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
- pr_info("kernel schedule profiling enabled (shift: %u)\n",
- prof_shift);
+ select = schedstr;
} else if (!strncmp(str, kvmstr, strlen(kvmstr))) {
prof_on = KVM_PROFILING;
- if (str[strlen(kvmstr)] == ',')
- str += strlen(kvmstr) + 1;
- if (get_option(&str, &par))
- prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
- pr_info("kernel KVM profiling enabled (shift: %u)\n",
- prof_shift);
+ select = kvmstr;
} else if (get_option(&str, &par)) {
prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
prof_on = CPU_PROFILING;
pr_info("kernel profiling enabled (shift: %u)\n",
prof_shift);
}
+
+ if (select) {
+ if (str[strlen(select)] == ',')
+ str += strlen(select) + 1;
+ if (get_option(&str, &par))
+ prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
+ pr_info("kernel %s profiling enabled (shift: %u)\n",
+ select, prof_shift);
+ }
+
return 1;
}
__setup("profile=", profile_setup);
_
Patches currently in -mm which might be from wuchi.zero@xxxxxxxxx are
lib-debugobjects-fix-stat-count-and-optimize-debug_objects_mem_init.patch
initramfs-mask-my_inptr-as-__initdata.patch
profile-simplify-redundant-code-in-profile_setup.patch
