v2: - keep 'restore_all' label in "x86/entry/head/32: use local labels"
--- Thanks to all the recent x86 entry code refactoring, most tasks' kernel stacks start at the same offset right below their saved pt_regs, regardless of which syscall was used to enter the kernel. That creates a nice convention which makes it straightforward to identify the end of the stack, which can be useful [*] for the unwinder. But there a few places where tasks don't yet follow the convention. This patch set finishes the job. [*] This will be useful for three upcoming proposed features: - Detecting corrupt stacks in the unwinder (which will also be a force for ensuring this end of stack convention continues to be followed in the future). - Printing all saved pt_regs on the stack during an oops/warning. - Validating stacks in the livepatch consistency model. Josh Poimboeuf (9): x86/entry/head/32: use local labels x86/entry/32: rename 'error_code' to 'common_exception' x86/entry/32: fix the end of the stack for newly forked tasks x86/head/32: fix the end of the stack for idle tasks x86/smp: fix initial idle stack location on 32-bit x86/asm/head: use a common function for starting CPUs x86/head: put real return address on idle task stack x86/head: fix the end of the stack for idle tasks x86: move _stext marker to before head code arch/x86/entry/entry_32.S | 108 +++++++++++++++++++++++++----------------- arch/x86/kernel/head_32.S | 49 +++++++++++-------- arch/x86/kernel/head_64.S | 42 ++++++++-------- arch/x86/kernel/smpboot.c | 4 +- arch/x86/kernel/vmlinux.lds.S | 2 +- 5 files changed, 116 insertions(+), 89 deletions(-) -- 2.7.4
