X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=kernel%2Ffork.c;h=80284eb488ced61808dedf0b999af2f55c494d28;hb=8d42db189ca99703f0f4f91c477cb54808c8eaaa;hp=8c859eef8e6a5b825612b750608f452459626643;hpb=6b3286ed1169d74fea401367d6d4d6c6ec758a81;p=linux-2.6-omap-h63xx.git

diff --git a/kernel/fork.c b/kernel/fork.c
index 8c859eef8e6..80284eb488c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -36,6 +36,7 @@
 #include <linux/syscalls.h>
 #include <linux/jiffies.h>
 #include <linux/futex.h>
+#include <linux/task_io_accounting_ops.h>
 #include <linux/rcupdate.h>
 #include <linux/ptrace.h>
 #include <linux/mount.h>
@@ -202,7 +203,7 @@ static inline int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
 	struct mempolicy *pol;
 
 	down_write(&oldmm->mmap_sem);
-	flush_cache_mm(oldmm);
+	flush_cache_dup_mm(oldmm);
 	/*
 	 * Not linked in yet - no deadlock potential:
 	 */
@@ -613,7 +614,7 @@ static inline int copy_fs(unsigned long clone_flags, struct task_struct * tsk)
 
 static int count_open_files(struct fdtable *fdt)
 {
-	int size = fdt->max_fdset;
+	int size = fdt->max_fds;
 	int i;
 
 	/* Find the last open fd */
@@ -640,12 +641,10 @@ static struct files_struct *alloc_files(void)
 	newf->next_fd = 0;
 	fdt = &newf->fdtab;
 	fdt->max_fds = NR_OPEN_DEFAULT;
-	fdt->max_fdset = EMBEDDED_FD_SET_SIZE;
 	fdt->close_on_exec = (fd_set *)&newf->close_on_exec_init;
 	fdt->open_fds = (fd_set *)&newf->open_fds_init;
 	fdt->fd = &newf->fd_array[0];
 	INIT_RCU_HEAD(&fdt->rcu);
-	fdt->free_files = NULL;
 	fdt->next = NULL;
 	rcu_assign_pointer(newf->fdt, fdt);
 out:
@@ -661,7 +660,7 @@ static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
 {
 	struct files_struct *newf;
 	struct file **old_fds, **new_fds;
-	int open_files, size, i, expand;
+	int open_files, size, i;
 	struct fdtable *old_fdt, *new_fdt;
 
 	*errorp = -ENOMEM;
@@ -672,25 +671,14 @@ static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
 	spin_lock(&oldf->file_lock);
 	old_fdt = files_fdtable(oldf);
 	new_fdt = files_fdtable(newf);
-	size = old_fdt->max_fdset;
 	open_files = count_open_files(old_fdt);
-	expand = 0;
 
 	/*
-	 * Check whether we need to allocate a larger fd array or fd set.
-	 * Note: we're not a clone task, so the open count won't  change.
+	 * Check whether we need to allocate a larger fd array and fd set.
+	 * Note: we're not a clone task, so the open count won't change.
 	 */
-	if (open_files > new_fdt->max_fdset) {
-		new_fdt->max_fdset = 0;
-		expand = 1;
-	}
 	if (open_files > new_fdt->max_fds) {
 		new_fdt->max_fds = 0;
-		expand = 1;
-	}
-
-	/* if the old fdset gets grown now, we'll only copy up to "size" fds */
-	if (expand) {
 		spin_unlock(&oldf->file_lock);
 		spin_lock(&newf->file_lock);
 		*errorp = expand_files(newf, open_files-1);
@@ -710,8 +698,10 @@ static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
 	old_fds = old_fdt->fd;
 	new_fds = new_fdt->fd;
 
-	memcpy(new_fdt->open_fds->fds_bits, old_fdt->open_fds->fds_bits, open_files/8);
-	memcpy(new_fdt->close_on_exec->fds_bits, old_fdt->close_on_exec->fds_bits, open_files/8);
+	memcpy(new_fdt->open_fds->fds_bits,
+		old_fdt->open_fds->fds_bits, open_files/8);
+	memcpy(new_fdt->close_on_exec->fds_bits,
+		old_fdt->close_on_exec->fds_bits, open_files/8);
 
 	for (i = open_files; i != 0; i--) {
 		struct file *f = *old_fds++;
@@ -736,22 +726,19 @@ static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
 	/* This is long word aligned thus could use a optimized version */ 
 	memset(new_fds, 0, size); 
 
-	if (new_fdt->max_fdset > open_files) {
-		int left = (new_fdt->max_fdset-open_files)/8;
+	if (new_fdt->max_fds > open_files) {
+		int left = (new_fdt->max_fds-open_files)/8;
 		int start = open_files / (8 * sizeof(unsigned long));
 
 		memset(&new_fdt->open_fds->fds_bits[start], 0, left);
 		memset(&new_fdt->close_on_exec->fds_bits[start], 0, left);
 	}
 
-out:
 	return newf;
 
 out_release:
-	free_fdset (new_fdt->close_on_exec, new_fdt->max_fdset);
-	free_fdset (new_fdt->open_fds, new_fdt->max_fdset);
-	free_fd_array(new_fdt->fd, new_fdt->max_fds);
 	kmem_cache_free(files_cachep, newf);
+out:
 	return NULL;
 }
 
@@ -1051,10 +1038,13 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	p->utime = cputime_zero;
 	p->stime = cputime_zero;
  	p->sched_time = 0;
+#ifdef CONFIG_TASK_XACCT
 	p->rchar = 0;		/* I/O counter: bytes read */
 	p->wchar = 0;		/* I/O counter: bytes written */
 	p->syscr = 0;		/* I/O counter: read syscalls */
 	p->syscw = 0;		/* I/O counter: write syscalls */
+#endif
+	task_io_accounting_init(p);
 	acct_clear_integrals(p);
 
  	p->it_virt_expires = cputime_zero;
@@ -1325,7 +1315,7 @@ noinline struct pt_regs * __devinit __attribute__((weak)) idle_regs(struct pt_re
 	return regs;
 }
 
-struct task_struct * __devinit fork_idle(int cpu)
+struct task_struct * __cpuinit fork_idle(int cpu)
 {
 	struct task_struct *task;
 	struct pt_regs regs;