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Anders Roxell c6fee7c854 powerpc/lib/sstep: fix 'ptesync' build error 
commit fe663df7825811358531dc2e8a52d9eaa5e3515e upstream.

Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
2.37.90.20220207) the following build error shows up:

  {standard input}: Assembler messages:
  {standard input}:2088: Error: unrecognized opcode: `ptesync'
  make[3]: *** [/builds/linux/scripts/Makefile.build:287: arch/powerpc/lib/sstep.o] Error 1

Add the 'ifdef CONFIG_PPC64' around the 'ptesync' in function
'emulate_update_regs()' to like it is in 'analyse_instr()'. Since it looks like
it got dropped inadvertently by commit 3cdfcbfd32 ("powerpc: Change
analyse_instr so it doesn't modify *regs").

A key detail is that analyse_instr() will never recognise lwsync or
ptesync on 32-bit (because of the existing ifdef), and as a result
emulate_update_regs() should never be called with an op specifying
either of those on 32-bit. So removing them from emulate_update_regs()
should be a nop in terms of runtime behaviour.

Fixes: 3cdfcbfd32 ("powerpc: Change analyse_instr so it doesn't modify *regs")
Cc: stable@vger.kernel.org # v4.14+
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
[mpe: Add last paragraph of change log mentioning analyse_instr() details]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220211005113.1361436-1-anders.roxell@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2022-02-23 11:59:58 +01:00
..
boot powerpc/fsl/dts: Enable WA for erratum A-009885 on fman3l MDIO buses 2022-01-27 09:19:52 +01:00
configs powerpc/config: Renable MTD_PHYSMAP_OF 2021-09-22 12:26:24 +02:00
crypto
…
include powerpc/security: Add a helper to query stf_barrier type 2021-11-17 09:48:49 +01:00
kernel powerpc/32: Fix boot failure with GCC latent entropy plugin 2022-02-01 17:24:36 +01:00
kvm KVM: PPC: Book3S: Suppress failed alloc warning in H_COPY_TOFROM_GUEST 2022-01-27 09:19:48 +01:00
lib powerpc/lib/sstep: fix 'ptesync' build error 2022-02-23 11:59:58 +01:00
math-emu
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mm powerpc/mm: Fix lockup on kernel exec fault 2021-07-19 08:53:14 +02:00
net powerpc/bpf: Emit stf barrier instruction sequences for BPF_NOSPEC 2021-11-17 09:48:49 +01:00
oprofile
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perf powerpc/perf/hv-gpci: Fix counter value parsing 2021-09-22 12:26:19 +02:00
platforms powerpc/cell: Fix clang -Wimplicit-fallthrough warning 2022-01-27 09:19:52 +01:00
purgatory
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sysdev powerpc/dcr: Use cmplwi instead of 3-argument cmpli 2021-11-26 10:47:16 +01:00
tools
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xmon
…
Kbuild
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Kconfig powerpc: Fix HAVE_HARDLOCKUP_DETECTOR_ARCH build configuration 2021-05-14 09:44:26 +02:00
Kconfig.debug powerpc: iommu: fix build when neither PCI or IBMVIO is set 2021-05-14 09:44:28 +02:00
Makefile
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Makefile.postlink
…