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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-09-24 09:14:56 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-10-24 17:16:57 +0200 |
| commit | e258d719ff28ecc7a048eb8f78380e68c4b3a3f0 (patch) | |
| tree | 1c7f496b97cef1111b230371940e603a2ca401a4 /arch/s390/mm | |
| parent | 7d7c7b24e416afb2637be8447e03ca4457c100fd (diff) | |
| download | linux-e258d719ff28ecc7a048eb8f78380e68c4b3a3f0.tar.bz2 | |
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/mm')
| -rw-r--r-- | arch/s390/mm/fault.c | 9 | ||||
| -rw-r--r-- | arch/s390/mm/pgtable.c | 4 |
2 files changed, 2 insertions, 11 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index fc6679210d83..8f29762671cf 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -115,13 +115,8 @@ static inline int user_space_fault(unsigned long trans_exc_code) if (trans_exc_code == 2) /* Access via secondary space, set_fs setting decides */ return current->thread.mm_segment.ar4; - if (s390_user_mode == HOME_SPACE_MODE) - /* User space if the access has been done via home space. */ - return trans_exc_code == 3; /* - * If the user space is not the home space the kernel runs in home - * space. Access via secondary space has already been covered, - * access via primary space or access register is from user space + * Access via primary space or access register is from user space * and access via home space is from the kernel. */ return trans_exc_code != 3; @@ -471,7 +466,7 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write) int access, fault; /* Emulate a uaccess fault from kernel mode. */ - regs.psw.mask = psw_kernel_bits | PSW_MASK_DAT | PSW_MASK_MCHECK; + regs.psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; if (!irqs_disabled()) regs.psw.mask |= PSW_MASK_IO | PSW_MASK_EXT; regs.psw.addr = (unsigned long) __builtin_return_address(0); diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index de8cbc30dcd1..94f37a9fb1e5 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -1157,10 +1157,6 @@ int s390_enable_sie(void) struct mm_struct *mm = tsk->mm; struct mmu_gather tlb; - /* Do we have switched amode? If no, we cannot do sie */ - if (s390_user_mode == HOME_SPACE_MODE) - return -EINVAL; - /* Do we have pgstes? if yes, we are done */ if (mm_has_pgste(tsk->mm)) return 0; |