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[S390] Use do_exception() in pagetable walk usercopy functions.

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The pagetable walk usercopy functions have used a modified copy of the
do_exception() function for fault handling. This lead to inconsistencies
with recent changes to do_exception(), e.g. performance counters. This
patch changes the pagetable walk usercopy code to call do_exception()
directly, eliminating the redundancy. A new parameter is added to
do_exception() to specify the fault address.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer
2009-12-07 12:51:47 +01:00
committed by Martin Schwidefsky
parent 1ab947de29
commit 6c1e3e7943
3 changed files with 76 additions and 96 deletions
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2
arch/s390/include/asm/uaccess.h
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@@ -93,6 +93,8 @@ extern struct uaccess_ops uaccess_mvcos;
extern struct uaccess_ops uaccess_mvcos_switch;
extern struct uaccess_ops uaccess_pt;
extern int __handle_fault(unsigned long, unsigned long, int);
static inline int __put_user_fn(size_t size, void __user *ptr, void *x)
{
size = uaccess.copy_to_user_small(size, ptr, x);