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microblaze: Fix do_page_fault for no context

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Calling fixup when we are in kernel mode. This
prevent fault for copy_to/from_user. This fault
was find thanks to writev01/03/04 LTP tests.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2009-07-16 16:00:49 +02:00
parent f14d6f7c31
commit f10eca6e10
1 changed files with 4 additions and 9 deletions
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13
arch/microblaze/mm/fault.c
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@ -122,15 +122,10 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
} }
#endif /* CONFIG_KGDB */ #endif /* CONFIG_KGDB */
if (in_atomic() || mm == NULL) { if (in_atomic() || !mm) {
/* FIXME */ if (kernel_mode(regs))
if (kernel_mode(regs)) { goto bad_area_nosemaphore;
printk(KERN_EMERG
"Page fault in kernel mode - Oooou!!! pid %d\n",
current->pid);
_exception(SIGSEGV, regs, code, address);
return;
}
/* in_atomic() in user mode is really bad, /* in_atomic() in user mode is really bad,
as is current->mm == NULL. */ as is current->mm == NULL. */
printk(KERN_EMERG "Page fault in user mode with " printk(KERN_EMERG "Page fault in user mode with "