linux

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Sami Tolvanen 556b80a2b5 arm64: fix alternatives with LLVM's integrated assembler

[ Upstream commit c54f90c2627cc316d365e3073614731e17dbc631 ]

LLVM's integrated assembler fails with the following error when
building KVM:

  <inline asm>:12:6: error: expected absolute expression
   .if kvm_update_va_mask == 0
       ^
  <inline asm>:21:6: error: expected absolute expression
   .if kvm_update_va_mask == 0
       ^
  <inline asm>:24:2: error: unrecognized instruction mnemonic
          NOT_AN_INSTRUCTION
          ^
  LLVM ERROR: Error parsing inline asm

These errors come from ALTERNATIVE_CB and __ALTERNATIVE_CFG,
which test for the existence of the callback parameter in inline
assembly using the following expression:

  " .if " __stringify(cb) " == 0\n"

This works with GNU as, but isn't supported by LLVM. This change
splits __ALTERNATIVE_CFG and ALTINSTR_ENTRY into separate macros
to fix the LLVM build.

Link: https://github.com/ClangBuiltLinux/linux/issues/472
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2020-02-28 16:36:05 +01:00

alpha

alpha: Fix Eiger NR_IRQS to 128

2019-02-20 10:20:53 +01:00

arc

ARC: [plat-axs10x]: Add missing multicast filter number to GMAC node

2020-02-14 16:32:22 -05:00

arm

ARM: dts: r8a7779: Add device node for ARM global timer

2020-02-28 16:36:01 +01:00

arm64

arm64: fix alternatives with LLVM's integrated assembler