linux-kernel - linux-next: manual merge of the tip tree with the powerpc tree

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Date:   Tue, 15 Mar 2022 13:08:57 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: manual merge of the tip tree with the powerpc tree

Hi all,

Today's linux-next merge of the tip tree got a conflict in:

  arch/powerpc/include/asm/livepatch.h

between commit:

  a4520b252765 ("powerpc/ftrace: Add support for livepatch to PPC32")

from the powerpc tree and commit:

  a557abfd1a16 ("x86/livepatch: Validate __fentry__ location")

from the tip tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc arch/powerpc/include/asm/livepatch.h
index 6f10de6af6e3,7b9dcd51af32..000000000000
--- a/arch/powerpc/include/asm/livepatch.h
+++ b/arch/powerpc/include/asm/livepatch.h
@@@ -14,21 -14,11 +14,11 @@@
  #ifdef CONFIG_LIVEPATCH
  static inline void klp_arch_set_pc(struct ftrace_regs *fregs, unsigned long ip)
  {
 -	struct pt_regs *regs = ftrace_get_regs(fregs);
 -
 -	regs_set_return_ip(regs, ip);
 +	ftrace_instruction_pointer_set(fregs, ip);
  }
- 
- #define klp_get_ftrace_location klp_get_ftrace_location
- static inline unsigned long klp_get_ftrace_location(unsigned long faddr)
- {
- 	/*
- 	 * Live patch works on PPC32 and only with -mprofile-kernel on PPC64. In
- 	 * both cases, the ftrace location is always within the first 16 bytes.
- 	 */
- 	return ftrace_location_range(faddr, faddr + 16);
- }
 +#endif /* CONFIG_LIVEPATCH */
  
 +#ifdef CONFIG_LIVEPATCH_64
  static inline void klp_init_thread_info(struct task_struct *p)
  {
  	/* + 1 to account for STACK_END_MAGIC */

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