lkml.org 
[lkml]   [2014]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 3.15 35/84] arm64: implement TASK_SIZE_OF
    Date
    3.15-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Colin Cross <ccross@android.com>

    commit fa2ec3ea10bd377f9d55772b1dab65178425a1a2 upstream.

    include/linux/sched.h implements TASK_SIZE_OF as TASK_SIZE if it
    is not set by the architecture headers. TASK_SIZE uses the
    current task to determine the size of the virtual address space.
    On a 64-bit kernel this will cause reading /proc/pid/pagemap of a
    64-bit process from a 32-bit process to return EOF when it reads
    past 0xffffffff.

    Implement TASK_SIZE_OF exactly the same as TASK_SIZE with
    test_tsk_thread_flag instead of test_thread_flag.

    Signed-off-by: Colin Cross <ccross@android.com>
    Acked-by: Will Deacon <will.deacon@arm.com>
    Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/arm64/include/asm/memory.h | 2 ++
    1 file changed, 2 insertions(+)

    --- a/arch/arm64/include/asm/memory.h
    +++ b/arch/arm64/include/asm/memory.h
    @@ -56,6 +56,8 @@
    #define TASK_SIZE_32 UL(0x100000000)
    #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
    TASK_SIZE_32 : TASK_SIZE_64)
    +#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \
    + TASK_SIZE_32 : TASK_SIZE_64)
    #else
    #define TASK_SIZE TASK_SIZE_64
    #endif /* CONFIG_COMPAT */



    \
     
     \ /
      Last update: 2014-07-16 09:41    [W:4.443 / U:0.120 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site