From: Mikulas Patocka <mpatocka@redhat.com>
Date: Fri, 21 Dec 2012 20:23:36 +0000 (+0000)
Subject: dm ioctl: remove PF_MEMALLOC
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5023e5cf58e1dae904e2e8b5b9779c33512b75a1;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

dm ioctl: remove PF_MEMALLOC

When allocating memory for the userspace ioctl data, set some
appropriate GPF flags directly instead of using PF_MEMALLOC.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index a651d528f80d..a37aeba7dc1b 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1556,7 +1556,10 @@ static int copy_params(struct dm_ioctl __user *user, struct dm_ioctl **param)
 
 	secure_data = tmp.flags & DM_SECURE_DATA_FLAG;
 
-	dmi = vmalloc(tmp.data_size);
+	/*
+	 * Try to avoid low memory issues when a device is suspended.
+	 */
+	dmi = __vmalloc(tmp.data_size, GFP_NOIO | __GFP_REPEAT | __GFP_HIGH, PAGE_KERNEL);
 	if (!dmi) {
 		if (secure_data && clear_user(user, tmp.data_size))
 			return -EFAULT;
@@ -1656,19 +1659,11 @@ static int ctl_ioctl(uint command, struct dm_ioctl __user *user)
 		return -ENOTTY;
 	}
 
-	/*
-	 * Trying to avoid low memory issues when a device is
-	 * suspended.
-	 */
-	current->flags |= PF_MEMALLOC;
-
 	/*
 	 * Copy the parameters into kernel space.
 	 */
 	r = copy_params(user, &param);
 
-	current->flags &= ~PF_MEMALLOC;
-
 	if (r)
 		return r;
 
diff --git a/include/uapi/linux/dm-ioctl.h b/include/uapi/linux/dm-ioctl.h
index 91e3a360f611..539b179b349c 100644
--- a/include/uapi/linux/dm-ioctl.h
+++ b/include/uapi/linux/dm-ioctl.h
@@ -268,8 +268,8 @@ enum {
 
 #define DM_VERSION_MAJOR	4
 #define DM_VERSION_MINOR	23
-#define DM_VERSION_PATCHLEVEL	0
-#define DM_VERSION_EXTRA	"-ioctl (2012-07-25)"
+#define DM_VERSION_PATCHLEVEL	1
+#define DM_VERSION_EXTRA	"-ioctl (2012-12-18)"
 
 /* Status bits */
 #define DM_READONLY_FLAG	(1 << 0) /* In/Out */