lkml.org 
[lkml]   [2011]   [May]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/4] Remove last BKL leftover: lock_depth
Date
From: Andi Kleen <ak@linux.intel.com>

This was the (hopefully) last BKL leftover: the per task lock_depth
field.

After all users are gone remove the task_struct lock_depth field.
Depending on the configuration this will not actually shrink task_struct
unfortunately due to padding. It helps a bit on 32bit. And on 64bit
it allows new bloat.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
include/linux/init_task.h | 1 -
include/linux/sched.h | 2 --
kernel/fork.c | 1 -
3 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index caa151f..689496b 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -134,7 +134,6 @@ extern struct cred init_cred;
.stack = &init_thread_info, \
.usage = ATOMIC_INIT(2), \
.flags = PF_KTHREAD, \
- .lock_depth = -1, \
.prio = MAX_PRIO-20, \
.static_prio = MAX_PRIO-20, \
.normal_prio = MAX_PRIO-20, \
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 53373bc..006c31f 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1193,8 +1193,6 @@ struct task_struct {
unsigned int flags; /* per process flags, defined below */
unsigned int ptrace;

- int lock_depth; /* BKL lock depth */
-
#ifdef CONFIG_SMP
#ifdef __ARCH_WANT_UNLOCKED_CTXSW
int oncpu;
diff --git a/kernel/fork.c b/kernel/fork.c
index e7548de..aca6287 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1103,7 +1103,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,

posix_cpu_timers_init(p);

- p->lock_depth = -1; /* -1 = no lock */
do_posix_clock_monotonic_gettime(&p->start_time);
p->real_start_time = p->start_time;
monotonic_to_bootbased(&p->real_start_time);
--
1.7.4.4


\
 
 \ /
  Last update: 2011-05-06 23:09    [W:0.663 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site