From: Nick Desaulniers ndesaulniers@google.com
commit e6a0c958bdf9b2e1b57501fc9433a461f0a6aadd upstream.
A kernel built with CONFIG_THUMB2_KERNEL=y and using clang as the assembler could generate non-naturally-aligned v7wbi_tlb_fns which results in a boot failure. The original commit adding the macro missed the .align directive on this data.
Link: https://github.com/ClangBuiltLinux/linux/issues/1447 Link: https://lore.kernel.org/all/0699da7b-354f-aecc-a62f-e25693209af4@linaro.org/ Debugged-by: Ard Biesheuvel ardb@kernel.org Debugged-by: Nathan Chancellor nathan@kernel.org Debugged-by: Richard Henderson richard.henderson@linaro.org
Fixes: 66a625a88174 ("ARM: mm: proc-macros: Add generic proc/cache/tlb struct definition macros") Suggested-by: Ard Biesheuvel ardb@kernel.org Acked-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Nick Desaulniers ndesaulniers@google.com Tested-by: Nathan Chancellor nathan@kernel.org Signed-off-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/mm/proc-macros.S | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arm/mm/proc-macros.S +++ b/arch/arm/mm/proc-macros.S @@ -342,6 +342,7 @@ ENTRY(\name()_cache_fns)
.macro define_tlb_functions name:req, flags_up:req, flags_smp .type \name()_tlb_fns, #object + .align 2 ENTRY(\name()_tlb_fns) .long \name()_flush_user_tlb_range .long \name()_flush_kern_tlb_range