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powerpc fixes for 6.7 #4

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- Fix stack teardown in ftrace_no_trace, seen as crashes doing CPU hotplug
    while ftrace is active.
 
 Thanks to: Naveen N Rao
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Merge tag 'powerpc-6.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:

 - Fix stack teardown in ftrace_no_trace, seen as crashes doing CPU
   hotplug while ftrace is active.

   Thanks to Naveen N Rao.

* tag 'powerpc-6.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/ftrace: Fix stack teardown in ftrace_no_trace
This commit is contained in:
Linus Torvalds 2023-12-09 19:32:35 -08:00
commit c527f5606a
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/kernel/trace/ftrace_entry.S
View File

@ -62,7 +62,7 @@
.endif
/* Save previous stack pointer (r1) */
addi r8, r1, SWITCH_FRAME_SIZE
addi r8, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE
PPC_STL r8, GPR1(r1)
.if \allregs == 1
@ -182,7 +182,7 @@ ftrace_no_trace:
mflr r3
mtctr r3
REST_GPR(3, r1)
addi r1, r1, SWITCH_FRAME_SIZE
addi r1, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE
mtlr r0
bctr
#endif