The patch titled
introduce is_rt_policy() helper
has been added to the -mm tree. Its filename is
introduce-is_rt_policy-helper.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: introduce is_rt_policy() helper
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Imho, makes the code a bit easier to read.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/sched.h | 4 ++--
kernel/sched.c | 5 ++---
2 files changed, 4 insertions(+), 5 deletions(-)
diff -puN include/linux/sched.h~introduce-is_rt_policy-helper include/linux/sched.h
--- a/include/linux/sched.h~introduce-is_rt_policy-helper
+++ a/include/linux/sched.h
@@ -504,8 +504,8 @@ struct signal_struct {
#define rt_prio(prio) unlikely((prio) < MAX_RT_PRIO)
#define rt_task(p) rt_prio((p)->prio)
#define batch_task(p) (unlikely((p)->policy == SCHED_BATCH))
-#define has_rt_policy(p) \
- unlikely((p)->policy != SCHED_NORMAL && (p)->policy != SCHED_BATCH)
+#define is_rt_policy(p) ((p) != SCHED_NORMAL && (p) != SCHED_BATCH)
+#define has_rt_policy(p) unlikely(is_rt_policy((p)->policy))
/*
* Some day this will be a full-fledged user tracking system..
diff -puN kernel/sched.c~introduce-is_rt_policy-helper kernel/sched.c
--- a/kernel/sched.c~introduce-is_rt_policy-helper
+++ a/kernel/sched.c
@@ -4072,8 +4072,7 @@ recheck:
(p->mm && param->sched_priority > MAX_USER_RT_PRIO-1) ||
(!p->mm && param->sched_priority > MAX_RT_PRIO-1))
return -EINVAL;
- if ((policy == SCHED_NORMAL || policy == SCHED_BATCH)
- != (param->sched_priority == 0))
+ if (is_rt_policy(policy) != (param->sched_priority != 0))
return -EINVAL;
/*
@@ -4097,7 +4096,7 @@ recheck:
!rlim_rtprio)
return -EPERM;
/* can't increase priority */
- if ((policy != SCHED_NORMAL && policy != SCHED_BATCH) &&
+ if (is_rt_policy(policy) &&
param->sched_priority > p->rt_priority &&
param->sched_priority > rlim_rtprio)
return -EPERM;
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
sys_getppid-oopses-on-debug-kernel-v2.patch
for-2618-revert-drop-tasklist-lock-in-do_sched_setscheduler.patch
pid-implement-transfer_pid-and-use-it-to-simplify-de_thread.patch
pid-remove-temporary-debug-code-in-attach_pid.patch
rtmutex-clean-up-and-remove-some-extra-spinlocks.patch
rtmutex-clean-up-and-remove-some-extra-spinlocks-more.patch
elf_core_dump-dont-take-tasklist_lock.patch
elf_fdpic_core_dump-dont-take-tasklist_lock.patch
has_stopped_jobs-cleanup.patch
__dequeue_signal-cleanup.patch
do_sched_setscheduler-dont-take-tasklist_lock.patch
introduce-is_rt_policy-helper.patch
simplify-pid-iterators.patch
pidhash-temporary-debug-checks.patch
-
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