]> git.baikalelectronics.ru Git - kernel.git/commit
powerpc/livepatch: Add livepatch stack to struct thread_info
authorMichael Ellerman <mpe@ellerman.id.au>
Thu, 24 Mar 2016 11:04:04 +0000 (22:04 +1100)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 14 Apr 2016 05:47:06 +0000 (15:47 +1000)
commitd910daac010ef1ad921cf66eb36ff20d5f591571
tree5d2bf3efea21bedf6a0df86b66f4c420fd06190e
parent2fae27d5373ed9369bb1e98fa8b296fd1f949868
powerpc/livepatch: Add livepatch stack to struct thread_info

In order to support live patching we need to maintain an alternate
stack of TOC & LR values. We use the base of the stack for this, and
store the "live patch stack pointer" in struct thread_info.

Unlike the other fields of thread_info, we can not statically initialise
that value, so it must be done at run time.

This patch just adds the code to support that, it is not enabled until
the next patch which actually adds live patch support.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Balbir Singh <bsingharora@gmail.com>
arch/powerpc/include/asm/livepatch.h
arch/powerpc/include/asm/thread_info.h
arch/powerpc/kernel/irq.c
arch/powerpc/kernel/process.c
arch/powerpc/kernel/setup_64.c