diff options
Diffstat (limited to 'include/linux/export.h')
| -rw-r--r-- | include/linux/export.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/include/linux/export.h b/include/linux/export.h index 696c0f48afc7..412cd509effe 100644 --- a/include/linux/export.h +++ b/include/linux/export.h @@ -5,17 +5,24 @@ * to reduce the amount of pointless cruft we feed to gcc when only * exporting a simple symbol or two. * - * If you feel the need to add #include <linux/foo.h> to this file - * then you are doing something wrong and should go away silently. + * Try not to add #includes here. It slows compilation and makes kernel + * hackers place grumpy comments in header files. */ /* Some toolchains use a `_' prefix for all user symbols. */ -#ifdef CONFIG_SYMBOL_PREFIX -#define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX +#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX +#define __VMLINUX_SYMBOL(x) _##x +#define __VMLINUX_SYMBOL_STR(x) "_" #x #else -#define MODULE_SYMBOL_PREFIX "" +#define __VMLINUX_SYMBOL(x) x +#define __VMLINUX_SYMBOL_STR(x) #x #endif +/* Indirect, so macros are expanded before pasting. */ +#define VMLINUX_SYMBOL(x) __VMLINUX_SYMBOL(x) +#define VMLINUX_SYMBOL_STR(x) __VMLINUX_SYMBOL_STR(x) + +#ifndef __ASSEMBLY__ struct kernel_symbol { unsigned long value; @@ -51,7 +58,7 @@ extern struct module __this_module; __CRC_SYMBOL(sym, sec) \ static const char __kstrtab_##sym[] \ __attribute__((section("__ksymtab_strings"), aligned(1))) \ - = MODULE_SYMBOL_PREFIX #sym; \ + = VMLINUX_SYMBOL_STR(sym); \ static const struct kernel_symbol __ksymtab_##sym \ __used \ __attribute__((section("___ksymtab" sec "+" #sym), unused)) \ @@ -85,5 +92,6 @@ extern struct module __this_module; #define EXPORT_UNUSED_SYMBOL_GPL(sym) #endif /* CONFIG_MODULES */ +#endif /* !__ASSEMBLY__ */ #endif /* _LINUX_EXPORT_H */ |