Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 369 deletions

diff --git a/ANDROID_3.4.5/fs/timerfd.c b/ANDROID_3.4.5/fs/timerfd.c
deleted file mode 100644
index dffeb379..00000000
--- a/ANDROID_3.4.5/fs/timerfd.c
+++ /dev/null
@@ -1,369 +0,0 @@
-/*
- *  fs/timerfd.c
- *
- *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
- *
- *
- *  Thanks to Thomas Gleixner for code reviews and useful comments.
- *
- */
-
-#include <linux/file.h>
-#include <linux/poll.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/time.h>
-#include <linux/hrtimer.h>
-#include <linux/anon_inodes.h>
-#include <linux/timerfd.h>
-#include <linux/syscalls.h>
-#include <linux/rcupdate.h>
-
-struct timerfd_ctx {
-	struct hrtimer tmr;
-	ktime_t tintv;
-	ktime_t moffs;
-	wait_queue_head_t wqh;
-	u64 ticks;
-	int expired;
-	int clockid;
-	struct rcu_head rcu;
-	struct list_head clist;
-	bool might_cancel;
-};
-
-static LIST_HEAD(cancel_list);
-static DEFINE_SPINLOCK(cancel_lock);
-
-/*
- * This gets called when the timer event triggers. We set the "expired"
- * flag, but we do not re-arm the timer (in case it's necessary,
- * tintv.tv64 != 0) until the timer is accessed.
- */
-static enum hrtimer_restart timerfd_tmrproc(struct hrtimer *htmr)
-{
-	struct timerfd_ctx *ctx = container_of(htmr, struct timerfd_ctx, tmr);
-	unsigned long flags;
-
-	spin_lock_irqsave(&ctx->wqh.lock, flags);
-	ctx->expired = 1;
-	ctx->ticks++;
-	wake_up_locked(&ctx->wqh);
-	spin_unlock_irqrestore(&ctx->wqh.lock, flags);
-
-	return HRTIMER_NORESTART;
-}
-
-/*
- * Called when the clock was set to cancel the timers in the cancel
- * list. This will wake up processes waiting on these timers. The
- * wake-up requires ctx->ticks to be non zero, therefore we increment
- * it before calling wake_up_locked().
- */
-void timerfd_clock_was_set(void)
-{
-	ktime_t moffs = ktime_get_monotonic_offset();
-	struct timerfd_ctx *ctx;
-	unsigned long flags;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(ctx, &cancel_list, clist) {
-		if (!ctx->might_cancel)
-			continue;
-		spin_lock_irqsave(&ctx->wqh.lock, flags);
-		if (ctx->moffs.tv64 != moffs.tv64) {
-			ctx->moffs.tv64 = KTIME_MAX;
-			ctx->ticks++;
-			wake_up_locked(&ctx->wqh);
-		}
-		spin_unlock_irqrestore(&ctx->wqh.lock, flags);
-	}
-	rcu_read_unlock();
-}
-
-static void timerfd_remove_cancel(struct timerfd_ctx *ctx)
-{
-	if (ctx->might_cancel) {
-		ctx->might_cancel = false;
-		spin_lock(&cancel_lock);
-		list_del_rcu(&ctx->clist);
-		spin_unlock(&cancel_lock);
-	}
-}
-
-static bool timerfd_canceled(struct timerfd_ctx *ctx)
-{
-	if (!ctx->might_cancel || ctx->moffs.tv64 != KTIME_MAX)
-		return false;
-	ctx->moffs = ktime_get_monotonic_offset();
-	return true;
-}
-
-static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags)
-{
-	if (ctx->clockid == CLOCK_REALTIME && (flags & TFD_TIMER_ABSTIME) &&
-	    (flags & TFD_TIMER_CANCEL_ON_SET)) {
-		if (!ctx->might_cancel) {
-			ctx->might_cancel = true;
-			spin_lock(&cancel_lock);
-			list_add_rcu(&ctx->clist, &cancel_list);
-			spin_unlock(&cancel_lock);
-		}
-	} else if (ctx->might_cancel) {
-		timerfd_remove_cancel(ctx);
-	}
-}
-
-static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
-{
-	ktime_t remaining;
-
-	remaining = hrtimer_expires_remaining(&ctx->tmr);
-	return remaining.tv64 < 0 ? ktime_set(0, 0): remaining;
-}
-
-static int timerfd_setup(struct timerfd_ctx *ctx, int flags,
-			 const struct itimerspec *ktmr)
-{
-	enum hrtimer_mode htmode;
-	ktime_t texp;
-	int clockid = ctx->clockid;
-
-	htmode = (flags & TFD_TIMER_ABSTIME) ?
-		HRTIMER_MODE_ABS: HRTIMER_MODE_REL;
-
-	texp = timespec_to_ktime(ktmr->it_value);
-	ctx->expired = 0;
-	ctx->ticks = 0;
-	ctx->tintv = timespec_to_ktime(ktmr->it_interval);
-	hrtimer_init(&ctx->tmr, clockid, htmode);
-	hrtimer_set_expires(&ctx->tmr, texp);
-	ctx->tmr.function = timerfd_tmrproc;
-	if (texp.tv64 != 0) {
-		hrtimer_start(&ctx->tmr, texp, htmode);
-		if (timerfd_canceled(ctx))
-			return -ECANCELED;
-	}
-	return 0;
-}
-
-static int timerfd_release(struct inode *inode, struct file *file)
-{
-	struct timerfd_ctx *ctx = file->private_data;
-
-	timerfd_remove_cancel(ctx);
-	hrtimer_cancel(&ctx->tmr);
-	kfree_rcu(ctx, rcu);
-	return 0;
-}
-
-static unsigned int timerfd_poll(struct file *file, poll_table *wait)
-{
-	struct timerfd_ctx *ctx = file->private_data;
-	unsigned int events = 0;
-	unsigned long flags;
-
-	poll_wait(file, &ctx->wqh, wait);
-
-	spin_lock_irqsave(&ctx->wqh.lock, flags);
-	if (ctx->ticks)
-		events |= POLLIN;
-	spin_unlock_irqrestore(&ctx->wqh.lock, flags);
-
-	return events;
-}
-
-static ssize_t timerfd_read(struct file *file, char __user *buf, size_t count,
-			    loff_t *ppos)
-{
-	struct timerfd_ctx *ctx = file->private_data;
-	ssize_t res;
-	u64 ticks = 0;
-
-	if (count < sizeof(ticks))
-		return -EINVAL;
-	spin_lock_irq(&ctx->wqh.lock);
-	if (file->f_flags & O_NONBLOCK)
-		res = -EAGAIN;
-	else
-		res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks);
-
-	/*
-	 * If clock has changed, we do not care about the
-	 * ticks and we do not rearm the timer. Userspace must
-	 * reevaluate anyway.
-	 */
-	if (timerfd_canceled(ctx)) {
-		ctx->ticks = 0;
-		ctx->expired = 0;
-		res = -ECANCELED;
-	}
-
-	if (ctx->ticks) {
-		ticks = ctx->ticks;
-
-		if (ctx->expired && ctx->tintv.tv64) {
-			/*
-			 * If tintv.tv64 != 0, this is a periodic timer that
-			 * needs to be re-armed. We avoid doing it in the timer
-			 * callback to avoid DoS attacks specifying a very
-			 * short timer period.
-			 */
-			ticks += hrtimer_forward_now(&ctx->tmr,
-						     ctx->tintv) - 1;
-			hrtimer_restart(&ctx->tmr);
-		}
-		ctx->expired = 0;
-		ctx->ticks = 0;
-	}
-	spin_unlock_irq(&ctx->wqh.lock);
-	if (ticks)
-		res = put_user(ticks, (u64 __user *) buf) ? -EFAULT: sizeof(ticks);
-	return res;
-}
-
-static const struct file_operations timerfd_fops = {
-	.release	= timerfd_release,
-	.poll		= timerfd_poll,
-	.read		= timerfd_read,
-	.llseek		= noop_llseek,
-};
-
-static struct file *timerfd_fget(int fd)
-{
-	struct file *file;
-
-	file = fget(fd);
-	if (!file)
-		return ERR_PTR(-EBADF);
-	if (file->f_op != &timerfd_fops) {
-		fput(file);
-		return ERR_PTR(-EINVAL);
-	}
-
-	return file;
-}
-
-SYSCALL_DEFINE2(timerfd_create, int, clockid, int, flags)
-{
-	int ufd;
-	struct timerfd_ctx *ctx;
-
-	/* Check the TFD_* constants for consistency.  */
-	BUILD_BUG_ON(TFD_CLOEXEC != O_CLOEXEC);
-	BUILD_BUG_ON(TFD_NONBLOCK != O_NONBLOCK);
-
-	if ((flags & ~TFD_CREATE_FLAGS) ||
-	    (clockid != CLOCK_MONOTONIC &&
-	     clockid != CLOCK_REALTIME))
-		return -EINVAL;
-
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
-	if (!ctx)
-		return -ENOMEM;
-
-	init_waitqueue_head(&ctx->wqh);
-	ctx->clockid = clockid;
-	hrtimer_init(&ctx->tmr, clockid, HRTIMER_MODE_ABS);
-	ctx->moffs = ktime_get_monotonic_offset();
-
-	ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx,
-			       O_RDWR | (flags & TFD_SHARED_FCNTL_FLAGS));
-	if (ufd < 0)
-		kfree(ctx);
-
-	return ufd;
-}
-
-SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
-		const struct itimerspec __user *, utmr,
-		struct itimerspec __user *, otmr)
-{
-	struct file *file;
-	struct timerfd_ctx *ctx;
-	struct itimerspec ktmr, kotmr;
-	int ret;
-
-	if (copy_from_user(&ktmr, utmr, sizeof(ktmr)))
-		return -EFAULT;
-
-	if ((flags & ~TFD_SETTIME_FLAGS) ||
-	    !timespec_valid(&ktmr.it_value) ||
-	    !timespec_valid(&ktmr.it_interval))
-		return -EINVAL;
-
-	file = timerfd_fget(ufd);
-	if (IS_ERR(file))
-		return PTR_ERR(file);
-	ctx = file->private_data;
-
-	timerfd_setup_cancel(ctx, flags);
-
-	/*
-	 * We need to stop the existing timer before reprogramming
-	 * it to the new values.
-	 */
-	for (;;) {
-		spin_lock_irq(&ctx->wqh.lock);
-		if (hrtimer_try_to_cancel(&ctx->tmr) >= 0)
-			break;
-		spin_unlock_irq(&ctx->wqh.lock);
-		cpu_relax();
-	}
-
-	/*
-	 * If the timer is expired and it's periodic, we need to advance it
-	 * because the caller may want to know the previous expiration time.
-	 * We do not update "ticks" and "expired" since the timer will be
-	 * re-programmed again in the following timerfd_setup() call.
-	 */
-	if (ctx->expired && ctx->tintv.tv64)
-		hrtimer_forward_now(&ctx->tmr, ctx->tintv);
-
-	kotmr.it_value = ktime_to_timespec(timerfd_get_remaining(ctx));
-	kotmr.it_interval = ktime_to_timespec(ctx->tintv);
-
-	/*
-	 * Re-program the timer to the new value ...
-	 */
-	ret = timerfd_setup(ctx, flags, &ktmr);
-
-	spin_unlock_irq(&ctx->wqh.lock);
-	fput(file);
-	if (otmr && copy_to_user(otmr, &kotmr, sizeof(kotmr)))
-		return -EFAULT;
-
-	return ret;
-}
-
-SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr)
-{
-	struct file *file;
-	struct timerfd_ctx *ctx;
-	struct itimerspec kotmr;
-
-	file = timerfd_fget(ufd);
-	if (IS_ERR(file))
-		return PTR_ERR(file);
-	ctx = file->private_data;
-
-	spin_lock_irq(&ctx->wqh.lock);
-	if (ctx->expired && ctx->tintv.tv64) {
-		ctx->expired = 0;
-		ctx->ticks +=
-			hrtimer_forward_now(&ctx->tmr, ctx->tintv) - 1;
-		hrtimer_restart(&ctx->tmr);
-	}
-	kotmr.it_value = ktime_to_timespec(timerfd_get_remaining(ctx));
-	kotmr.it_interval = ktime_to_timespec(ctx->tintv);
-	spin_unlock_irq(&ctx->wqh.lock);
-	fput(file);
-
-	return copy_to_user(otmr, &kotmr, sizeof(kotmr)) ? -EFAULT: 0;
-}
-