Re: [PATCH 5.15 v3 01/16] x86,nospec: Simplify {JMP,CALL}_NOSPEC

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: 09d09531a51a24635bc3331f56d92ee7092f5516

WARNING: Author mismatch between patch and upstream commit:
Backport author: Pawan Gupta<pawan.kumar.gupta@linux.intel.com>
Commit author: Peter Zijlstra<peterz@infradead.org>

Status in newer kernel trees:
6.14.y | Present (exact SHA1)
6.12.y | Present (exact SHA1)
6.6.y | Present (exact SHA1)
6.1.y | Present (exact SHA1)

Note: The patch differs from the upstream commit:
---
1:  09d09531a51a2 ! 1:  c6ae69642e75d x86,nospec: Simplify {JMP,CALL}_NOSPEC
    @@ Metadata
      ## Commit message ##
         x86,nospec: Simplify {JMP,CALL}_NOSPEC
     
    +    commit 09d09531a51a24635bc3331f56d92ee7092f5516 upstream.
    +
         Have {JMP,CALL}_NOSPEC generate the same code GCC does for indirect
         calls and rely on the objtool retpoline patching infrastructure.
     
    @@ Commit message
         compiler generated retpolines are not.
     
         Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    +    Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
     
      ## arch/x86/include/asm/nospec-branch.h ##
     @@
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-5.15.y       |  Success    |  Success   |