fuse: prepare lookup for nfs export

[safe/jmp/linux-2.6] / mm / pdflush.c

diff --git a/mm/pdflush.c b/mm/pdflush.c
index b02102f..0cbe0c6 100644 (file)
--- a/mm/pdflush.c
+++ b/mm/pdflush.c
@@ -17,10 +17,11 @@
 #include <linux/gfp.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/fs.h>          // Needed by writeback.h
-#include <linux/writeback.h>   // Prototypes pdflush_operation()
+#include <linux/fs.h>          /* Needed by writeback.h          */
+#include <linux/writeback.h>   /* Prototypes pdflush_operation() */
 #include <linux/kthread.h>
 #include <linux/cpuset.h>
+#include <linux/freezer.h>
 
 
 /*
@@ -91,6 +92,7 @@ struct pdflush_work {
 static int __pdflush(struct pdflush_work *my_work)
 {
        current->flags |= PF_FLUSHER | PF_SWAPWRITE;
+       set_freezable();
        my_work->fn = NULL;
        my_work->who = current;
        INIT_LIST_HEAD(&my_work->list);
@@ -128,7 +130,7 @@ static int __pdflush(struct pdflush_work *my_work)
                 * Thread creation: For how long have there been zero
                 * available threads?
                 */
-               if (jiffies - last_empty_jifs > 1 * HZ) {
+               if (time_after(jiffies, last_empty_jifs + 1 * HZ)) {
                        /* unlocked list_empty() test is OK here */
                        if (list_empty(&pdflush_list)) {
                                /* unlocked test is OK here */
@@ -149,7 +151,7 @@ static int __pdflush(struct pdflush_work *my_work)
                if (nr_pdflush_threads <= MIN_PDFLUSH_THREADS)
                        continue;
                pdf = list_entry(pdflush_list.prev, struct pdflush_work, list);
-               if (jiffies - pdf->when_i_went_to_sleep > 1 * HZ) {
+               if (time_after(jiffies, pdf->when_i_went_to_sleep + 1 * HZ)) {
                        /* Limit exit rate */
                        pdf->when_i_went_to_sleep = jiffies;
                        break;                                  /* exeunt */
@@ -185,8 +187,8 @@ static int pdflush(void *dummy)
         * This is needed as pdflush's are dynamically created and destroyed.
         * The boottime pdflush's are easily placed w/o these 2 lines.
         */
-       cpus_allowed = cpuset_cpus_allowed(current);
-       set_cpus_allowed(current, cpus_allowed);
+       cpuset_cpus_allowed(current, &cpus_allowed);
+       set_cpus_allowed_ptr(current, &cpus_allowed);
 
        return __pdflush(&my_work);
 }
@@ -205,7 +207,6 @@ int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0)
 
        spin_lock_irqsave(&pdflush_lock, flags);
        if (list_empty(&pdflush_list)) {
-               spin_unlock_irqrestore(&pdflush_lock, flags);
                ret = -1;
        } else {
                struct pdflush_work *pdf;
@@ -217,8 +218,9 @@ int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0)
                pdf->fn = fn;
                pdf->arg0 = arg0;
                wake_up_process(pdf->who);
-               spin_unlock_irqrestore(&pdflush_lock, flags);
        }
+       spin_unlock_irqrestore(&pdflush_lock, flags);
+
        return ret;
 }