• Stefan Agner's avatar
    ARM: 8851/1: add TUSERCOND() macro for conditional postfix · a6c9e96b
    Stefan Agner authored
    Unified assembly syntax requires conditionals to be postfixes.
    TUSER() currently only takes a single argument which then gets
    appended t (with translation) on every instruction.
    
    This fixes a build error when using LLVM's integrated assembler:
      In file included from kernel/futex.c:72:
      ./arch/arm/include/asm/futex.h:116:3: error: invalid instruction, did you mean: strt?
              "2:     " TUSER(streq) "        %3, [%4]n"
               ^
      <inline asm>:5:4: note: instantiated into assembly here
      2:      streqt  r2, [r4]
              ^~~~~~
    
    Additionally, for GCC ".syntax unified" for inline assembly.
    When compiling non-Thumb2 GCC always emits a ".syntax divided"
    at the beginning of the inline assembly which makes the
    assembler fail. Since GCC 5 there is the -masm-syntax-unified
    GCC option which make GCC assume unified syntax asm and hence
    emits ".syntax unified" even in ARM mode. However, the option
    is broken since GCC version 6 (see GCC PR88648 [1]). Work
    around by adding ".syntax unified" as part of the inline
    assembly.
    
    [0] https://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html#index-masm-syntax-unified
    [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88648Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
    Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
    a6c9e96b
domain.h 3.76 KB