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authorAlexander Gordeev <agordeev@linux.ibm.com>2020-02-28 13:32:01 +0300
committerVasily Gorbik <gor@linux.ibm.com>2020-03-28 14:46:12 +0300
commit6a3eb35e56b3308966945b76ec1dfbc18537feef (patch)
tree2a10a11c9f08507830ebad5b4982cd1bbe4737ae /arch/s390/include/asm/processor.h
parentb2745655be3658cd422ba2b07cf19eb64e0c0eaf (diff)
downloadlinux-6a3eb35e56b3308966945b76ec1dfbc18537feef.tar.xz
s390/mm: remove page table downgrade support
This update consolidates page table handling code. Because there are hardly any 31-bit binaries left we do not need to optimize for that. No extra efforts are needed to ensure that a compat task does not map anything above 2GB. The TASK_SIZE limit for 31-bit tasks is 2GB already and the generic code does check that a resulting map address would not surpass that limit. Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/processor.h')
-rw-r--r--arch/s390/include/asm/processor.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index c9522346799f..dee5e57da518 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -179,7 +179,6 @@ typedef struct thread_struct thread_struct;
regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \
regs->psw.addr = new_psw; \
regs->gprs[15] = new_stackp; \
- crst_table_downgrade(current->mm); \
execve_tail(); \
} while (0)