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powerpc/64e: Convert cmpi to cmpwi in head_64.S

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From 80f23935ca ("powerpc: Convert cmp to cmpd in idle enter sequence"):

  PowerPC's "cmp" instruction has four operands. Normally people write
  "cmpw" or "cmpd" for the second cmp operand 0 or 1. But, frequently
  people forget, and write "cmp" with just three operands.

  With older binutils this is silently accepted as if this was "cmpw",
  while often "cmpd" is wanted. With newer binutils GAS will complain
  about this for 64-bit code. For 32-bit code it still silently assumes
  "cmpw" is what is meant.

In this case, cmpwi is called for, so this is just a build fix for
new toolchains.

Cc: stable@vger.kernel.org # v3.0+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2016-11-24 00:02:07 +11:00 committed by Michael Ellerman
parent 3b10d0095a
commit f87f253bac
1 changed files with 4 additions and 4 deletions
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8
arch/powerpc/kernel/head_64.S
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@ -221,9 +221,9 @@ booting_thread_hwid:
*/ */
_GLOBAL(book3e_start_thread) _GLOBAL(book3e_start_thread)
LOAD_REG_IMMEDIATE(r5, MSR_KERNEL) LOAD_REG_IMMEDIATE(r5, MSR_KERNEL)
cmpi 0, r3, 0 cmpwi r3, 0
beq 10f beq 10f
cmpi 0, r3, 1 cmpwi r3, 1
beq 11f beq 11f
/* If the thread id is invalid, just exit. */ /* If the thread id is invalid, just exit. */
b 13f b 13f
@ -248,9 +248,9 @@ _GLOBAL(book3e_start_thread)
* r3 = the thread physical id * r3 = the thread physical id
*/ */
_GLOBAL(book3e_stop_thread) _GLOBAL(book3e_stop_thread)
cmpi 0, r3, 0 cmpwi r3, 0
beq 10f beq 10f
cmpi 0, r3, 1 cmpwi r3, 1
beq 10f beq 10f
/* If the thread id is invalid, just exit. */ /* If the thread id is invalid, just exit. */
b 13f b 13f