Denys is right that KERNEL_STACK_OFFSET is a mess. Let's start fixing it. This removes all C code that *reads* kernel_stack. It also fixes the KERNEL_STACK_OFFSET abomination in ia32_sysenter_target.
It does not fix the KERNEL_STACK_OFFSET abomination in GET_THREAD_INFO and THREAD_INFO. I think that should be its own patch. It also doesn't change the two syscall targets. To fix them, we should make a decision. Either we should make KERNEL_STACK_OFFSET have the correct nonzero value to save an instruction or we should get rid of kernel_stack entirely. Andy Lutomirski (3): x86: Add this_cpu_sp0() to read sp0 for the current cpu x86: Switch all C consumers of kernel_stack to this_cpu_sp0 x86, asm: Change the 32-bit sysenter code to use sp0 arch/x86/ia32/ia32entry.S | 3 +-- arch/x86/include/asm/processor.h | 5 +++++ arch/x86/include/asm/thread_info.h | 3 +-- arch/x86/kernel/asm-offsets_64.c | 1 + arch/x86/kernel/traps.c | 2 +- arch/x86/lguest/boot.c | 1 + arch/x86/xen/enlighten.c | 1 + 7 files changed, 11 insertions(+), 5 deletions(-) -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
