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x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2

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virt_addr_valid() calls __pa(), which calls __phys_addr(). With
CONFIG_DEBUG_VIRTUAL=y, __phys_addr() will kill the kernel if the
address *isn't* valid. That's clearly wrong for virt_addr_valid().

We also incorporate the debugging checks into virt_addr_valid().

Signed-off-by: Vegard Nossum <vegardno@ben.ifi.uio.no>
Acked-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Vegard Nossum
2008-10-03 17:54:25 +02:00
committed by Ingo Molnar
parent 7f2f49a582
commit af5c2bd16a
4 changed files with 44 additions and 6 deletions
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2
arch/x86/kernel/doublefault_32.c
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@ -66,6 +66,6 @@ struct tss_struct doublefault_tss __cacheline_aligned = {
.ds = __USER_DS,
.fs = __KERNEL_PERCPU,
.__cr3 = __phys_addr_const((unsigned long)swapper_pg_dir)
.__cr3 = __pa_nodebug(swapper_pg_dir),
}
};