[PATCH] Fix nice range for RLIMIT NICE

[Matt Mackall <mpm@selenic.com>]

Looks like I let this one slip through the cracks:

Make RLIMIT_NICE ranges consistent with getpriority(2)

As suggested by Michael Kerrisk <mtk-manpages@gmx.net>, make
RLIMIT_NICE consistent with getpriority before it becomes available in
released glibc.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Chris Wright <chrisw@osdl.org>

Index: lhg/kernel/sched.c
===================================================================
--- lhg.orig/kernel/sched.c	2005-08-15 13:03:05.000000000 -0700
+++ lhg/kernel/sched.c	2005-08-15 13:09:21.000000000 -0700
@@ -3378,8 +3378,8 @@ EXPORT_SYMBOL(set_user_nice);
  */
 int can_nice(const task_t *p, const int nice)
 {
-	/* convert nice value [19,-20] to rlimit style value [0,39] */
-	int nice_rlim = 19 - nice;
+	/* convert nice value [19,-20] to rlimit style value [1,40] */
+	int nice_rlim = 20 - nice;
 	return (nice_rlim <= p->signal->rlim[RLIMIT_NICE].rlim_cur ||
 		capable(CAP_SYS_NICE));
 }


-- 
Mathematics is the supreme nostalgia of our time.