Eric Lee / smarc-fsl-linux-kernel

14 Dec, 2006

1 commit

  • ee36c2bf8   [PATCH] uml problems with linux/io.h ... Browse Code »

    Remove useless includes of linux/io.h, don't even try to build iomap_copy
    on uml (it doesn't have readb() et.al., so...)

    Signed-off-by: Al Viro
    Acked-by: Jeff Dike
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Al Viro
     

01 Oct, 2006

2 commits

  • db71daaba   [PATCH] Generic ioremap_page_range: flush_cache_vmap ... Browse Code »

    The existing implementation of ioremap_page_range(), which was taken
    from i386, does this:

    flush_cache_all();
    /* modify page tables */
    flush_tlb_all();

    I think this is a bit defensive, so this patch changes the generic
    implementation to do:

    /* modify page tables */
    flush_cache_vmap(start, end);

    instead, which is similar to what vmalloc() does. This should still
    be correct because we never modify existing PTEs. According to
    James Bottomley:

    The problem the flush_tlb_all() is trying to solve is to avoid stale tlb
    entries in the ioremap area. We're just being conservative by flushing
    on both map and unmap. Technically what vmalloc/vfree does (only flush
    the tlb on unmap) is just fine because it means that the only tlb
    entries in the remap area must belong to in-use mappings.

    Signed-off-by: Haavard Skinnemoen
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Russell King
    Cc: Mikael Starvik
    Cc: Andi Kleen
    Cc:
    Cc: Ralf Baechle
    Cc: Kyle McMartin
    Cc: Martin Schwidefsky
    Cc: Paul Mundt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Haavard Skinnemoen
     
  • 74588d8ba   [PATCH] Generic ioremap_page_range: implementation ... Browse Code »

    This patch adds a generic implementation of ioremap_page_range() in
    lib/ioremap.c based on the i386 implementation. It differs from the
    i386 version in the following ways:

    * The PTE flags are passed as a pgprot_t argument and must be
    determined up front by the arch-specific code. No additional
    PTE flags are added.
    * Uses set_pte_at() instead of set_pte()

    [bunk@stusta.de: warning fix]
    ]dhowells@redhat.com: nommu build fix]
    Signed-off-by: Haavard Skinnemoen
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Russell King
    Cc: Mikael Starvik
    Cc: Andi Kleen
    Cc:
    Cc: Ralf Baechle
    Cc: Kyle McMartin
    Cc: Martin Schwidefsky
    Cc: Paul Mundt
    Signed-off-by: Adrian Bunk
    Signed-off-by: David Howells
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Haavard Skinnemoen