Merge tag 'imx-soc-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6 into next/soc

From Shawn Guo:

imx soc changes for 3.11:

* New SoCs i.MX6 Sololite and Vybrid VF610 support
* imx5 and imx6 clock fixes and additions
* Update clock driver to use of_clk_init() function
* Refactor restart routine mxc_restart() to get it work for DT boot
  as well
* Clean up mxc specific ulpi access ops
* imx defconfig updates

* tag 'imx-soc-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6: (29 commits)
  ARM: imx_v6_v7_defconfig: Enable Vybrid VF610
  ARM: imx_v6_v7_defconfig: Enable imx-wm8962 by default
  ARM: clk-imx6qdl: Add clko1 configuration for imx6qdl-sabresd
  ARM: imx_v6_v7_defconfig: Enable PWM and backlight options
  ARM: imx: Remove mxc specific ulpi access ops
  ARM: imx: add initial support for VF610
  ARM: imx: add VF610 clock support
  ARM: imx_v6_v7_defconfig: enable parallel display
  ARM: imx: clk: No need to initialize phandle struct
  ARM: imx: irq-common: Include header to avoid sparse warning
  ARM: imx: Enable mx6 solo-lite support
  ARM: imx6: use common of_clk_init() call to initialize clocks
  ARM: imx6q: call of_clk_init() to register fixed rate clocks
  ARM: imx: imx_v6_v7_defconfig: Select CONFIG_DRM_IMX_TVE
  ARM: i.MX6: clk: add different DualLite MLB clock config
  ARM i.MX5: Add S/PDIF clocks
  ARM i.MX53: Add SATA clock
  ARM: imx6q: clk: add the eim_slow clock
  ARM: imx: remove MLB PLL from pllv3
  ARM: imx: disable pll8_mlb in mx6q_clks
  ...

Conflicts:
	arch/arm/Kconfig.debug (simple add/add conflict)

Includes an update to 3.10-rc6

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 16 insertions, 20 deletions

diff --git a/fs/aio.c b/fs/aio.c
index 7fe5bdee1630..2bbcacf74d0c 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -141,9 +141,6 @@ static void aio_free_ring(struct kioctx *ctx)
 	for (i = 0; i < ctx->nr_pages; i++)
 		put_page(ctx->ring_pages[i]);
 
-	if (ctx->mmap_size)
-		vm_munmap(ctx->mmap_base, ctx->mmap_size);
-
 	if (ctx->ring_pages && ctx->ring_pages != ctx->internal_pages)
 		kfree(ctx->ring_pages);
 }
@@ -322,11 +319,6 @@ static void free_ioctx(struct kioctx *ctx)
 
 	aio_free_ring(ctx);
 
-	spin_lock(&aio_nr_lock);
-	BUG_ON(aio_nr - ctx->max_reqs > aio_nr);
-	aio_nr -= ctx->max_reqs;
-	spin_unlock(&aio_nr_lock);
-
 	pr_debug("freeing %p\n", ctx);
 
 	/*
@@ -435,17 +427,24 @@ static void kill_ioctx(struct kioctx *ctx)
 {
 	if (!atomic_xchg(&ctx->dead, 1)) {
 		hlist_del_rcu(&ctx->list);
-		/* Between hlist_del_rcu() and dropping the initial ref */
-		synchronize_rcu();
 
 		/*
-		 * We can't punt to workqueue here because put_ioctx() ->
-		 * free_ioctx() will unmap the ringbuffer, and that has to be
-		 * done in the original process's context. kill_ioctx_rcu/work()
-		 * exist for exit_aio(), as in that path free_ioctx() won't do
-		 * the unmap.
+		 * It'd be more correct to do this in free_ioctx(), after all
+		 * the outstanding kiocbs have finished - but by then io_destroy
+		 * has already returned, so io_setup() could potentially return
+		 * -EAGAIN with no ioctxs actually in use (as far as userspace
+		 *  could tell).
 		 */
-		kill_ioctx_work(&ctx->rcu_work);
+		spin_lock(&aio_nr_lock);
+		BUG_ON(aio_nr - ctx->max_reqs > aio_nr);
+		aio_nr -= ctx->max_reqs;
+		spin_unlock(&aio_nr_lock);
+
+		if (ctx->mmap_size)
+			vm_munmap(ctx->mmap_base, ctx->mmap_size);
+
+		/* Between hlist_del_rcu() and dropping the initial ref */
+		call_rcu(&ctx->rcu_head, kill_ioctx_rcu);
 	}
 }
 
@@ -495,10 +494,7 @@ void exit_aio(struct mm_struct *mm)
 		 */
 		ctx->mmap_size = 0;
 
-		if (!atomic_xchg(&ctx->dead, 1)) {
-			hlist_del_rcu(&ctx->list);
-			call_rcu(&ctx->rcu_head, kill_ioctx_rcu);
-		}
+		kill_ioctx(ctx);
 	}
 }