sys: Replace hardcoding of -20 and 19 with MIN_NICE and MAX_NICE

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Link: http://lkml.kernel.org/r/0261f094b836f1acbcdf52e7166487c0c77323c8.1392103744.git.yangds.fnst@cn.fujitsu.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/sys.c b/kernel/sys.c
index c0a58be780a407a5bf350e852db1c9800c98dd34..adaeab6f7a870ae69537baebf4ca092a161d5013 100644 (file)
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -174,10 +174,10 @@ SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
 
        /* normalize: avoid signed division (rounding problems) */
        error = -ESRCH;
-       if (niceval < -20)
-               niceval = -20;
-       if (niceval > 19)
-               niceval = 19;
+       if (niceval < MIN_NICE)
+               niceval = MIN_NICE;
+       if (niceval > MAX_NICE)
+               niceval = MAX_NICE;
 
        rcu_read_lock();
        read_lock(&tasklist_lock);