Messages in this thread | | | Date | Thu, 08 Sep 2005 11:36:15 +0200 | From | Miloslav Trmac <> | Subject | Re: [PATCH] Wistron laptop button driver |
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Pekka Enberg wrote: > On 9/7/05, Miloslav Trmac <mitr@volny.cz> wrote: > >>+static int __init map_bios(void) >>+{ >>+ static const unsigned char __initdata signature[] >>+ = { 0x42, 0x21, 0x55, 0x30 }; >>+ >>+ void __iomem *base; >>+ size_t offset; >>+ uint32_t entry_point; >>+ >>+ base = ioremap(0xF0000, 0x10000); /* Can't fail */ > > How come? ioremap can return NULL if, for example, we run out of memory. Not with these values: > /* > * Don't remap the low PCI/ISA area, it's always mapped.. > */ > if (phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS) > return (void __iomem *) phys_to_virt(phys_addr);
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