• Vivek Goyal's avatar
    [PATCH] i386: move startup_32() in text.head section · f8657e1b
    Vivek Goyal authored
    o Entry startup_32 was in .text section but it was accessing some init
      data too and it prompts MODPOST to generate compilation warnings.
    
    WARNING: vmlinux - Section mismatch: reference to .init.data:boot_params from
    .text between '_text' (at offset 0xc0100029) and 'startup_32_smp'
    WARNING: vmlinux - Section mismatch: reference to .init.data:boot_params from
    .text between '_text' (at offset 0xc0100037) and 'startup_32_smp'
    WARNING: vmlinux - Section mismatch: reference to
    .init.data:init_pg_tables_end from .text between '_text' (at offset
    0xc0100099) and 'startup_32_smp'
    
    o Can't move startup_32 to .init.text as this entry point has to be at the
      start of bzImage. Hence moved startup_32 to a new section .text.head and
      instructed MODPOST to not to generate warnings if init data is being
      accessed from .text.head section. This code has been audited.
    
    o SMP boot up code (startup_32_smp) can go into .init.text if CPU hotplug
      is not supported. Otherwise it generates more warnings
    
    WARNING: vmlinux - Section mismatch: reference to .init.data:new_cpu_data from
    .text between 'checkCPUtype' (at offset 0xc0100126) and 'is486'
    WARNING: vmlinux - Section mismatch: reference to .init.data:new_cpu_data from
    .text between 'checkCPUtype' (at offset 0xc0100130) and 'is486'
    Signed-off-by: default avatarVivek Goyal <vgoyal@in.ibm.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarAndi Kleen <ak@suse.de>
    f8657e1b
head.S 15.9 KB