Keith,
What you actually are doing here is claiming copyright on code that
other people have written, and tighten the export restrictions.
kmap_atomic_prot_pfn() appeared long ago in drm git with identical code
and purpose, but with different authors, and iounmap_atomic is identical
to kunmap_atomic.
Pls fix.
/Thomas
Keith Packard wrote:
>
> diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
> new file mode 100644
> index 0000000..c559599
> --- /dev/null
> +++ b/arch/x86/mm/iomap_32.c
> @@ -0,0 +1,59 @@
> +/*
> + * Copyright © 2008 Keith Packard <[EMAIL PROTECTED]>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, write to the Free Software Foundation, Inc.,
> + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
> + */
> +
> +#include <asm/iomap.h>
> +#include <linux/module.h>
> +
> +/* Map 'pfn' using fixed map 'type' and protections 'prot'
> + */
> +void *
> +iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
> +{
> + enum fixed_addresses idx;
> + unsigned long vaddr;
> +
> + pagefault_disable();
> +
> + idx = type + KM_TYPE_NR*smp_processor_id();
> + vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
> + set_pte(kmap_pte-idx, pfn_pte(pfn, prot));
> + arch_flush_lazy_mmu_mode();
> +
> + return (void*) vaddr;
> +}
> +EXPORT_SYMBOL_GPL(iomap_atomic_prot_pfn);
> +
> +void
> +iounmap_atomic(void *kvaddr, enum km_type type)
> +{
> + unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
> + enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
> +
> + /*
> + * Force other mappings to Oops if they'll try to access this pte
> + * without first remap it. Keeping stale mappings around is a bad idea
> + * also, in case the page changes cacheability attributes or becomes
> + * a protected page in a hypervisor.
> + */
> + if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx))
> + kpte_clear_flush(kmap_pte-idx, vaddr);
> +
> + arch_flush_lazy_mmu_mode();
> + pagefault_enable();
> +}
> +EXPORT_SYMBOL_GPL(iounmap_atomic);
>
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