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s390/uaccess: always run the kernel in home space

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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>
This commit is contained in:
Martin Schwidefsky
2013-09-24 09:14:56 +02:00
parent 7d7c7b24e4
commit e258d719ff
21 changed files with 51 additions and 459 deletions
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4
arch/s390/kernel/ptrace.c
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@@ -200,7 +200,7 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr)
tmp = *(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr);
if (addr == (addr_t) &dummy->regs.psw.mask)
/* Return a clean psw mask. */
tmp = psw_user_bits | (tmp & PSW_MASK_USER);
tmp = PSW_USER_BITS | (tmp & PSW_MASK_USER);
} else if (addr < (addr_t) &dummy->regs.orig_gpr2) {
/*
@@ -322,7 +322,7 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
* psw and gprs are stored on the stack
*/
if (addr == (addr_t) &dummy->regs.psw.mask &&
((data & ~PSW_MASK_USER) != psw_user_bits ||
((data & ~PSW_MASK_USER) != PSW_USER_BITS ||
((data & PSW_MASK_EA) && !(data & PSW_MASK_BA))))
/* Invalid psw mask. */
return -EINVAL;