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| author | Michal Simek <monstr@monstr.eu> | 2009-07-16 16:00:49 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2009-07-27 07:39:55 +0200 |
| commit | f10eca6e107fd223c24393c09c40b916d2b3c427 (patch) | |
| tree | bd205ccdc9c810c51f46ef974cc39a5cf546ff67 /arch/microblaze/mm | |
| parent | f14d6f7c31c73a902a6b567dc719128e74603902 (diff) | |
| download | lwn-f10eca6e107fd223c24393c09c40b916d2b3c427.tar.gz lwn-f10eca6e107fd223c24393c09c40b916d2b3c427.zip | |
microblaze: Fix do_page_fault for no context
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>
Diffstat (limited to 'arch/microblaze/mm')
| -rw-r--r-- | arch/microblaze/mm/fault.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c index 956607a63f4c..398c76117355 100644 --- a/arch/microblaze/mm/fault.c +++ b/arch/microblaze/mm/fault.c @@ -122,15 +122,10 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, } #endif /* CONFIG_KGDB */ - if (in_atomic() || mm == NULL) { - /* FIXME */ - if (kernel_mode(regs)) { - printk(KERN_EMERG - "Page fault in kernel mode - Oooou!!! pid %d\n", - current->pid); - _exception(SIGSEGV, regs, code, address); - return; - } + if (in_atomic() || !mm) { + if (kernel_mode(regs)) + goto bad_area_nosemaphore; + /* in_atomic() in user mode is really bad, as is current->mm == NULL. */ printk(KERN_EMERG "Page fault in user mode with " |