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[PATCH] sys_setrlimit() cleanup 

- Whitespace cleanups

- Make that expression comprehensible.

There's a potential logic change here: we do the "is it_prof_expires equal to
zero" test after converting it to seconds, rather than doing the comparison
between raw cputime_t's.

But given that it's in units of seconds anyway, that shouldn't change
anything.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ulrich Weigand <uweigand@de.ibm.com>
Cc: Cliff Wickman <cpw@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton 2006-03-24 03:18:34 -08:00 committed by Linus Torvalds
parent de62a97ef5
commit ec9e16bacd
1 changed files with 15 additions and 11 deletions
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20
kernel/sys.c
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@ -1630,11 +1630,12 @@ asmlinkage long sys_old_getrlimit(unsigned int resource, struct rlimit __user *r
asmlinkage long sys_setrlimit(unsigned int resource, struct rlimit __user *rlim)
{
struct rlimit new_rlim, *old_rlim;
unsigned long it_prof_secs;
int retval;
if (resource >= RLIM_NLIMITS)
return -EINVAL;
if(copy_from_user(&new_rlim, rlim, sizeof(*rlim)))
if (copy_from_user(&new_rlim, rlim, sizeof(*rlim)))
return -EFAULT;
if (new_rlim.rlim_cur > new_rlim.rlim_max)
return -EINVAL;
@ -1653,19 +1654,22 @@ asmlinkage long sys_setrlimit(unsigned int resource, struct rlimit __user *rlim)
*old_rlim = new_rlim;
task_unlock(current->group_leader);
if (resource == RLIMIT_CPU && new_rlim.rlim_cur != RLIM_INFINITY &&
(cputime_eq(current->signal->it_prof_expires, cputime_zero) ||
new_rlim.rlim_cur <= cputime_to_secs(
current->signal->it_prof_expires))) {
if (resource != RLIMIT_CPU)
goto out;
if (new_rlim.rlim_cur == RLIM_INFINITY)
goto out;
it_prof_secs = cputime_to_secs(current->signal->it_prof_expires);
if (it_prof_secs == 0 || new_rlim.rlim_cur <= it_prof_secs) {
cputime_t cputime = secs_to_cputime(new_rlim.rlim_cur);
read_lock(&tasklist_lock);
spin_lock_irq(&current->sighand->siglock);
set_process_cpu_timer(current, CPUCLOCK_PROF,
&cputime, NULL);
set_process_cpu_timer(current, CPUCLOCK_PROF, &cputime, NULL);
spin_unlock_irq(&current->sighand->siglock);
read_unlock(&tasklist_lock);
}
out:
return 0;
}