[PATCH] remove task_struct.swappable

Remove unused task_struct.swappable.

include/linux/sched.h

@@ -343,7 +343,6 @@ struct task_struct {
 	unsigned long start_time;
 /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
 	unsigned long min_flt, maj_flt, nswap, cmin_flt, cmaj_flt, cnswap;
-	int swappable:1;
 /* process credentials */
 	uid_t uid,euid,suid,fsuid;
 	gid_t gid,egid,sgid,fsgid;

kernel/fork.c

@@ -757,7 +757,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	p->thread_info->preempt_count = 1;
 #endif
 	p->did_exec = 0;
-	p->swappable = 0;
 	p->state = TASK_UNINTERRUPTIBLE;
 
 	copy_flags(clone_flags, p);
@@ -841,7 +840,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	p->parent_exec_id = p->self_exec_id;
 
 	/* ok, now we should be set up.. */
-	p->swappable = 1;
 	if (clone_flags & CLONE_DETACHED)
 		p->exit_signal = -1;
 	else