• Rusty Russell's avatar
    CONFIG_SYMBOL_PREFIX: cleanup. · b92021b0
    Rusty Russell authored
    We have CONFIG_SYMBOL_PREFIX, which three archs define to the string
    "_".  But Al Viro broke this in "consolidate cond_syscall and
    SYSCALL_ALIAS declarations" (in linux-next), and he's not the first to
    do so.
    Using CONFIG_SYMBOL_PREFIX is awkward, since we usually just want to
    prefix it so something.  So various places define helpers which are
    defined to nothing if CONFIG_SYMBOL_PREFIX isn't set:
    1) include/asm-generic/unistd.h defines __SYMBOL_PREFIX.
    2) include/asm-generic/vmlinux.lds.h defines VMLINUX_SYMBOL(sym)
    3) include/linux/export.h defines MODULE_SYMBOL_PREFIX.
    4) include/linux/kernel.h defines SYMBOL_PREFIX (which differs from #7)
    5) kernel/modsign_certificate.S defines ASM_SYMBOL(sym)
    6) scripts/modpost.c defines MODULE_SYMBOL_PREFIX
    7) scripts/Makefile.lib defines SYMBOL_PREFIX on the commandline if
       CONFIG_SYMBOL_PREFIX is set, so that we have a non-string version
       for pasting.
    (arch/h8300/include/asm/linkage.h defines SYMBOL_NAME(), too).
    Let's solve this properly:
    1) No more generic prefix, just CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX.
    2) Make linux/export.h usable from asm.
    4) Make everyone use them.
    Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
    Reviewed-by: default avatarJames Hogan <james.hogan@imgtec.com>
    Tested-by: James Hogan <james.hogan@imgtec.com> (metag)
Makefile 47 KB