Gitweb:     http://git.kernel.org/linus/1a2142afa5646ad5af44bbe1febaa5e0b7e71156
Commit:     1a2142afa5646ad5af44bbe1febaa5e0b7e71156
Parent:     0d34fb8e93ceba7b6dad0062dbb4a0813bacd75b
Author:     Rusty Russell <rusty@rustcorp.com.au>
AuthorDate: Mon Mar 30 22:05:10 2009 -0600
Committer:  Rusty Russell <rusty@rustcorp.com.au>
CommitDate: Mon Mar 30 22:05:11 2009 +1030

    cpumask: remove dangerous CPU_MASK_ALL_PTR, &CPU_MASK_ALL
    
    Impact: cleanup
    
    (Thanks to Al Viro for reminding me of this, via Ingo)
    
    CPU_MASK_ALL is the (deprecated) "all bits set" cpumask, defined as so:
    
    	#define CPU_MASK_ALL (cpumask_t) { { ... } }
    
    Taking the address of such a temporary is questionable at best,
    unfortunately 321a8e9d (cpumask: add CPU_MASK_ALL_PTR macro) added
    CPU_MASK_ALL_PTR:
    
    	#define CPU_MASK_ALL_PTR (&CPU_MASK_ALL)
    
    Which formalizes this practice.  One day gcc could bite us over this
    usage (though we seem to have gotten away with it so far).
    
    So replace everywhere which used &CPU_MASK_ALL or CPU_MASK_ALL_PTR
    with the modern "cpu_all_mask" (a real const struct cpumask *).
    
    Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
    Acked-by: Ingo Molnar <mingo@elte.hu>
    Reported-by: Al Viro <viro@zeniv.linux.org.uk>
    Cc: Mike Travis <travis@sgi.com>
---
 init/main.c      |    2 +-
 kernel/kmod.c    |    2 +-
 kernel/kthread.c |    4 ++--
 mm/pdflush.c     |    2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/init/main.c b/init/main.c
index 6bf83af..1ac7ec7 100644
--- a/init/main.c
+++ b/init/main.c
@@ -842,7 +842,7 @@ static int __init kernel_init(void * unused)
 	/*
 	 * init can run on any cpu.
 	 */
-	set_cpus_allowed_ptr(current, CPU_MASK_ALL_PTR);
+	set_cpus_allowed_ptr(current, cpu_all_mask);
 	/*
 	 * Tell the world that we're going to be the grim
 	 * reaper of innocent orphaned children.
diff --git a/kernel/kmod.c b/kernel/kmod.c
index a27a5f6..f0c8f54 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -167,7 +167,7 @@ static int ____call_usermodehelper(void *data)
 	}
 
 	/* We can run anywhere, unlike our parent keventd(). */
-	set_cpus_allowed_ptr(current, CPU_MASK_ALL_PTR);
+	set_cpus_allowed_ptr(current, cpu_all_mask);
 
 	/*
 	 * Our parent is keventd, which runs with elevated scheduling priority.
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 4fbc456..84bbadd 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -110,7 +110,7 @@ static void create_kthread(struct kthread_create_info *create)
 		 */
 		sched_setscheduler(create->result, SCHED_NORMAL, &param);
 		set_user_nice(create->result, KTHREAD_NICE_LEVEL);
-		set_cpus_allowed_ptr(create->result, CPU_MASK_ALL_PTR);
+		set_cpus_allowed_ptr(create->result, cpu_all_mask);
 	}
 	complete(&create->done);
 }
@@ -240,7 +240,7 @@ int kthreadd(void *unused)
 	set_task_comm(tsk, "kthreadd");
 	ignore_signals(tsk);
 	set_user_nice(tsk, KTHREAD_NICE_LEVEL);
-	set_cpus_allowed_ptr(tsk, CPU_MASK_ALL_PTR);
+	set_cpus_allowed_ptr(tsk, cpu_all_mask);
 
 	current->flags |= PF_NOFREEZE | PF_FREEZER_NOSIG;
 
diff --git a/mm/pdflush.c b/mm/pdflush.c
index 15de509..118905e 100644
--- a/mm/pdflush.c
+++ b/mm/pdflush.c
@@ -191,7 +191,7 @@ static int pdflush(void *dummy)
 
 	/*
 	 * Some configs put our parent kthread in a limited cpuset,
-	 * which kthread() overrides, forcing cpus_allowed == CPU_MASK_ALL.
+	 * which kthread() overrides, forcing cpus_allowed == cpu_all_mask.
 	 * Our needs are more modest - cut back to our cpusets cpus_allowed.
 	 * This is needed as pdflush's are dynamically created and destroyed.
 	 * The boottime pdflush's are easily placed w/o these 2 lines.
--
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