diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-04-14 15:11:26 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-05-20 08:58:46 +0200 |
| commit | beef560b4cdfafb2211a856e1d722540f5151933 (patch) | |
| tree | 7ded8bd3d03266371d68d74d2d96ce8728c2390d /arch/s390/mm | |
| parent | f4192bf2dc5ae3b24ffb004e771397e737ef01e0 (diff) | |
s390/uaccess: simplify control register updates
Always switch to the kernel ASCE in switch_mm. Load the secondary
space ASCE in finish_arch_post_lock_switch after checking that
any pending page table operations have completed. The primary
ASCE is loaded in entry[64].S. With this the update_primary_asce
call can be removed from the switch_to macro and from the start
of switch_mm function. Remove the load_primary argument from
update_user_asce/clear_user_asce, rename update_user_asce to
set_user_asce and rename update_primary_asce to load_kernel_asce.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/pgtable.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index d7cfd57815fb..7881d4eb8b6b 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -53,8 +53,10 @@ static void __crst_table_upgrade(void *arg) { struct mm_struct *mm = arg; - if (current->active_mm == mm) - update_user_asce(mm, 1); + if (current->active_mm == mm) { + clear_user_asce(); + set_user_asce(mm); + } __tlb_flush_local(); } @@ -108,7 +110,7 @@ void crst_table_downgrade(struct mm_struct *mm, unsigned long limit) pgd_t *pgd; if (current->active_mm == mm) { - clear_user_asce(mm, 1); + clear_user_asce(); __tlb_flush_mm(mm); } while (mm->context.asce_limit > limit) { @@ -134,7 +136,7 @@ void crst_table_downgrade(struct mm_struct *mm, unsigned long limit) crst_table_free(mm, (unsigned long *) pgd); } if (current->active_mm == mm) - update_user_asce(mm, 1); + set_user_asce(mm); } #endif |