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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>
hifive-unleashed-5.1
Mikulas Patocka 2012-12-21 20:23:36 +00:00 committed by Alasdair G Kergon
parent 7960123f2d
commit 5023e5cf58
2 changed files with 6 additions and 11 deletions
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13
drivers/md/dm-ioctl.c
View File

@ -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;

4
include/uapi/linux/dm-ioctl.h
View File

@ -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 */