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getrusage: add the "signal_struct *sig" local variable

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No functional changes, cleanup/preparation.

Link: https://lkml.kernel.org/r/20230909172554.GA20441@redhat.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2023-09-09 19:25:54 +02:00 committed by Andrew Morton
parent e5ecf29c50
commit c7ac8231ac
1 changed files with 19 additions and 18 deletions
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37
kernel/sys.c
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@ -1786,6 +1786,7 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
unsigned long flags; unsigned long flags;
u64 tgutime, tgstime, utime, stime; u64 tgutime, tgstime, utime, stime;
unsigned long maxrss = 0; unsigned long maxrss = 0;
struct signal_struct *sig = p->signal;
memset((char *)r, 0, sizeof (*r)); memset((char *)r, 0, sizeof (*r));
utime = stime = 0; utime = stime = 0;
@ -1793,7 +1794,7 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
if (who == RUSAGE_THREAD) { if (who == RUSAGE_THREAD) {
task_cputime_adjusted(current, &utime, &stime); task_cputime_adjusted(current, &utime, &stime);
accumulate_thread_rusage(p, r); accumulate_thread_rusage(p, r);
maxrss = p->signal->maxrss; maxrss = sig->maxrss;
goto out; goto out;
} }
@ -1803,15 +1804,15 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
switch (who) { switch (who) {
case RUSAGE_BOTH: case RUSAGE_BOTH:
case RUSAGE_CHILDREN: case RUSAGE_CHILDREN:
utime = p->signal->cutime; utime = sig->cutime;
stime = p->signal->cstime; stime = sig->cstime;
r->ru_nvcsw = p->signal->cnvcsw; r->ru_nvcsw = sig->cnvcsw;
r->ru_nivcsw = p->signal->cnivcsw; r->ru_nivcsw = sig->cnivcsw;
r->ru_minflt = p->signal->cmin_flt; r->ru_minflt = sig->cmin_flt;
r->ru_majflt = p->signal->cmaj_flt; r->ru_majflt = sig->cmaj_flt;
r->ru_inblock = p->signal->cinblock; r->ru_inblock = sig->cinblock;
r->ru_oublock = p->signal->coublock; r->ru_oublock = sig->coublock;
maxrss = p->signal->cmaxrss; maxrss = sig->cmaxrss;
if (who == RUSAGE_CHILDREN) if (who == RUSAGE_CHILDREN)
break; break;
@ -1821,14 +1822,14 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
thread_group_cputime_adjusted(p, &tgutime, &tgstime); thread_group_cputime_adjusted(p, &tgutime, &tgstime);
utime += tgutime; utime += tgutime;
stime += tgstime; stime += tgstime;
r->ru_nvcsw += p->signal->nvcsw; r->ru_nvcsw += sig->nvcsw;
r->ru_nivcsw += p->signal->nivcsw; r->ru_nivcsw += sig->nivcsw;
r->ru_minflt += p->signal->min_flt; r->ru_minflt += sig->min_flt;
r->ru_majflt += p->signal->maj_flt; r->ru_majflt += sig->maj_flt;
r->ru_inblock += p->signal->inblock; r->ru_inblock += sig->inblock;
r->ru_oublock += p->signal->oublock; r->ru_oublock += sig->oublock;
if (maxrss < p->signal->maxrss) if (maxrss < sig->maxrss)
maxrss = p->signal->maxrss; maxrss = sig->maxrss;
t = p; t = p;
do { do {
accumulate_thread_rusage(t, r); accumulate_thread_rusage(t, r);