Merge remote-tracking branch 'linux-stable/linux-3.0.y' into p-android-omap-3.0-dev-espresso

Conflicts:
	Makefile
	arch/arm/include/asm/hardware/cache-l2x0.h
	arch/arm/kernel/smp.c
	arch/arm/mach-omap2/board-4430sdp.c
	arch/arm/mach-omap2/board-omap4panda.c
	arch/arm/mach-omap2/opp.c
	arch/ia64/include/asm/futex.h
	drivers/bluetooth/ath3k.c
	drivers/bluetooth/btusb.c
	drivers/firmware/efivars.c
	drivers/gpu/drm/i915/intel_lvds.c
	drivers/gpu/drm/radeon/radeon_atombios.c
	drivers/gpu/drm/radeon/radeon_irq_kms.c
	drivers/hwmon/fam15h_power.c
	drivers/mfd/twl6030-irq.c
	drivers/mmc/core/sdio.c
	drivers/net/tun.c
	drivers/net/usb/ipheth.c
	drivers/net/usb/usbnet.c
	drivers/usb/core/hub.c
	drivers/usb/host/xhci-mem.c
	drivers/usb/host/xhci.h
	drivers/usb/musb/omap2430.c
	drivers/usb/serial/ftdi_sio.c
	drivers/usb/serial/ftdi_sio_ids.h
	drivers/usb/serial/option.c
	drivers/usb/serial/qcserial.c
	drivers/usb/serial/ti_usb_3410_5052.c
	drivers/usb/serial/ti_usb_3410_5052.h
	drivers/video/omap2/dss/hdmi.c
	fs/splice.c
	include/asm-generic/pgtable.h
	include/net/sch_generic.h
	kernel/cgroup.c
	kernel/futex.c
	kernel/time/timekeeping.c
	net/ipv4/route.c
	net/ipv4/syncookies.c
	net/ipv4/tcp_ipv4.c
	net/wireless/util.c
	security/commoncap.c
	sound/soc/soc-dapm.c

1 files changed, 25 insertions, 13 deletions

diff --git a/mm/shmem.c b/mm/shmem.c
index 883e98f..bcfa97d 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1168,19 +1168,20 @@ static struct mempolicy *shmem_get_sbmpol(struct shmem_sb_info *sbinfo)
 static struct page *shmem_swapin(swp_entry_t entry, gfp_t gfp,
 			struct shmem_inode_info *info, unsigned long idx)
 {
-	struct mempolicy mpol, *spol;
 	struct vm_area_struct pvma;
 	struct page *page;
 
-	spol = mpol_cond_copy(&mpol,
-				mpol_shared_policy_lookup(&info->policy, idx));
-
 	/* Create a pseudo vma that just contains the policy */
 	pvma.vm_start = 0;
 	pvma.vm_pgoff = idx;
 	pvma.vm_ops = NULL;
-	pvma.vm_policy = spol;
+	pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
+
 	page = swapin_readahead(entry, gfp, &pvma, 0);
+
+	/* Drop reference taken by mpol_shared_policy_lookup() */
+	mpol_cond_put(pvma.vm_policy);
+
 	return page;
 }
 
@@ -1188,6 +1189,7 @@ static struct page *shmem_alloc_page(gfp_t gfp,
 			struct shmem_inode_info *info, unsigned long idx)
 {
 	struct vm_area_struct pvma;
+	struct page *page;
 
 	/* Create a pseudo vma that just contains the policy */
 	pvma.vm_start = 0;
@@ -1195,10 +1197,12 @@ static struct page *shmem_alloc_page(gfp_t gfp,
 	pvma.vm_ops = NULL;
 	pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
 
-	/*
-	 * alloc_page_vma() will drop the shared policy reference
-	 */
-	return alloc_page_vma(gfp, &pvma, 0);
+	page = alloc_page_vma(gfp, &pvma, 0);
+
+	/* Drop reference taken by mpol_shared_policy_lookup() */
+	mpol_cond_put(pvma.vm_policy);
+
+	return page;
 }
 #else /* !CONFIG_NUMA */
 #ifdef CONFIG_TMPFS
@@ -2348,12 +2352,14 @@ static struct dentry *shmem_fh_to_dentry(struct super_block *sb,
 {
 	struct inode *inode;
 	struct dentry *dentry = NULL;
-	u64 inum = fid->raw[2];
-	inum = (inum << 32) | fid->raw[1];
+	u64 inum;
 
 	if (fh_len < 3)
 		return NULL;
 
+	inum = fid->raw[2];
+	inum = (inum << 32) | fid->raw[1];
+
 	inode = ilookup5(sb, (unsigned long)(inum + fid->raw[0]),
 			shmem_match, fid->raw);
 	if (inode) {
@@ -2499,6 +2505,7 @@ static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
 	unsigned long inodes;
 	int error = -EINVAL;
 
+	config.mpol = NULL;
 	if (shmem_parse_options(data, &config, true))
 		return error;
 
@@ -2524,8 +2531,13 @@ static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
 	sbinfo->max_inodes  = config.max_inodes;
 	sbinfo->free_inodes = config.max_inodes - inodes;
 
-	mpol_put(sbinfo->mpol);
-	sbinfo->mpol        = config.mpol;	/* transfers initial ref */
+	/*
+	 * Preserve previous mempolicy unless mpol remount option was specified.
+	 */
+	if (config.mpol) {
+		mpol_put(sbinfo->mpol);
+		sbinfo->mpol = config.mpol;	/* transfers initial ref */
+	}
 out:
 	spin_unlock(&sbinfo->stat_lock);
 	return error;