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    mm/gup: Factor out VMA fault permission checking · d4925e00
    Dave Hansen 提交于
    This code matches a fault condition up with the VMA and ensures
    that the VMA allows the fault to be handled instead of just
    erroring out.
    
    We will be extending this in a moment to comprehend protection
    keys.
    Signed-off-by: NDave Hansen <dave.hansen@linux.intel.com>
    Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: Dave Hansen <dave@sr71.net>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
    Cc: Eric B Munson <emunson@akamai.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Jason Low <jason.low2@hp.com>
    Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Sasha Levin <sasha.levin@oracle.com>
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-mm@kvack.org
    Link: http://lkml.kernel.org/r/20160212210216.C3824032@viggo.jf.intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
    d4925e00
gup.c 43.2 KB