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dm ioctl: remove PF_MEMALLOC

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

Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: Alasdair G Kergon <[email protected]>
This commit is contained in:
Mikulas Patocka 2012-12-21 20:23:36 +00:00 • committed by Alasdair G Kergon
commit 5023e5cf58
2 changed files with 6 additions and 11 deletions
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13
drivers/md/dm-ioctl.c
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@ -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;