• Arnd Bergmann's avatar
    x86/boot: Avoid warning for zero-filling .bss · 96b745ca
    Arnd Bergmann authored
    commit 553bbc11 upstream.
    
    The latest binutils are warning about a .fill directive with an explicit
    value in a .bss section:
    
      arch/x86/kernel/head_32.S: Assembler messages:
      arch/x86/kernel/head_32.S:677: Warning: ignoring fill value in section `.bss..page_aligned'
      arch/x86/kernel/head_32.S:679: Warning: ignoring fill value in section `.bss..page_aligned'
    
    This comes from the 'ENTRY()' macro padding the space between the symbols
    with 'nop' via:
    
      .align 4,0x90
    
    Open-coding the .globl directive without the padding avoids that warning,
    as all the symbols are already page aligned.
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Link: http://lkml.kernel.org/r/20161116141726.2013389-1-arnd@arndb.deSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    96b745ca
head_32.S 18.3 KB