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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2013-09-24 09:14:56 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-10-24 17:16:57 +0200
commite258d719ff28ecc7a048eb8f78380e68c4b3a3f0 (patch)
tree1c7f496b97cef1111b230371940e603a2ca401a4 /arch/s390/kernel/vdso.c
parent7d7c7b24e416afb2637be8447e03ca4457c100fd (diff)
s390/uaccess: always run the kernel in home space
Simplify the uaccess code by removing the user_mode=home option. The kernel will now always run in the home space mode. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/vdso.c')
-rw-r--r--arch/s390/kernel/vdso.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 05d75c413137..a84476f2a9bb 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -84,8 +84,7 @@ struct vdso_data *vdso_data = &vdso_data_store.data;
*/
static void vdso_init_data(struct vdso_data *vd)
{
- vd->ectg_available =
- s390_user_mode != HOME_SPACE_MODE && test_facility(31);
+ vd->ectg_available = test_facility(31);
}
#ifdef CONFIG_64BIT
@@ -102,7 +101,7 @@ int vdso_alloc_per_cpu(struct _lowcore *lowcore)
lowcore->vdso_per_cpu_data = __LC_PASTE;
- if (s390_user_mode == HOME_SPACE_MODE || !vdso_enabled)
+ if (!vdso_enabled)
return 0;
segment_table = __get_free_pages(GFP_KERNEL, SEGMENT_ORDER);
@@ -147,7 +146,7 @@ void vdso_free_per_cpu(struct _lowcore *lowcore)
unsigned long segment_table, page_table, page_frame;
u32 *psal, *aste;
- if (s390_user_mode == HOME_SPACE_MODE || !vdso_enabled)
+ if (!vdso_enabled)
return;
psal = (u32 *)(addr_t) lowcore->paste[4];
@@ -165,7 +164,7 @@ static void vdso_init_cr5(void)
{
unsigned long cr5;
- if (s390_user_mode == HOME_SPACE_MODE || !vdso_enabled)
+ if (!vdso_enabled)
return;
cr5 = offsetof(struct _lowcore, paste);
__ctl_load(cr5, 5, 5);