lkml.org 
[lkml]   [2017]   [Dec]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4.14 048/159] x86/entry: Add task_top_of_stack() to find the top of a tasks stack
    Date
    4.14-stable review patch.  If anyone has any objections, please let me know.

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

    From: Andy Lutomirski <luto@kernel.org>

    commit 3500130b84a3cdc5b6796eba1daf178944935efe upstream.

    This will let us get rid of a few places that hardcode accesses to
    thread.sp0.

    Signed-off-by: Andy Lutomirski <luto@kernel.org>
    Cc: Borislav Petkov <bpetkov@suse.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Dave Hansen <dave.hansen@intel.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Link: http://lkml.kernel.org/r/b49b3f95a8ff858c40c9b0f5b32be0355324327d.1509609304.git.luto@kernel.org
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/x86/include/asm/processor.h | 2 ++
    1 file changed, 2 insertions(+)

    --- a/arch/x86/include/asm/processor.h
    +++ b/arch/x86/include/asm/processor.h
    @@ -796,6 +796,8 @@ static inline void spin_lock_prefetch(co
    #define TOP_OF_INIT_STACK ((unsigned long)&init_stack + sizeof(init_stack) - \
    TOP_OF_KERNEL_STACK_PADDING)

    +#define task_top_of_stack(task) ((unsigned long)(task_pt_regs(task) + 1))
    +
    #ifdef CONFIG_X86_32
    /*
    * User space process size: 3GB (default).

    \
     
     \ /
      Last update: 2017-12-22 10:46    [W:4.149 / U:0.392 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site