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    fix compilation with gcc 4.2 · cd5bfea2
    Peter Chubb 提交于
    gcc-4.2 is a lot more picky about its symbol handling.  EXPORT_SYMBOL no
    longer works on symbols that are undefined or defined with static scope.
    
    For example, with CONFIG_PROFILE off, I see:
    
      kernel/profile.c:206: error: __ksymtab_profile_event_unregister causes a section type conflict
      kernel/profile.c:205: error: __ksymtab_profile_event_register causes a section type conflict
    
    This patch moves the EXPORTs inside the #ifdef CONFIG_PROFILE, so we
    only try to export symbols that are defined.
    
    Also, in kernel/kprobes.c there's an EXPORT_SYMBOL_GPL() for
    jprobes_return, which if CONFIG_JPROBES is undefined is a static
    inline and gives the same error.
    
    And in drivers/acpi/resources/rsxface.c, there's an
    ACPI_EXPORT_SYMBOPL() for a static symbol. If it's static, it's not
    accessible from outside the compilation unit, so should bot be exported.
    
    These three changes allow building a zx1_defconfig kernel with gcc 4.2
    on IA64.
    
    [akpm@linux-foundation.org: export jpobe_return properly]
    Signed-off-by: NPeter Chubb <peterc@gelato.unsw.edu.au>
    Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
    Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
    Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
    Cc: "Luck, Tony" <tony.luck@intel.com>
    Cc: Len Brown <lenb@kernel.org>
    Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
    cd5bfea2
rsxface.c 18.1 KB