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authorRusty Russell <rusty@rustcorp.com.au>2013-03-15 15:04:17 +1030
committerRusty Russell <rusty@rustcorp.com.au>2013-03-15 15:09:43 +1030
commitb92021b09df70c1609e3547f3d6128dd560be97f (patch)
tree0203752a738c71718f5141b84f5143d1dc8b431d /arch
parent4febd95a8a85dd38b1a71fcf9726e19c7fd20039 (diff)
CONFIG_SYMBOL_PREFIX: cleanup.
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. 3) Define VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR(). 4) Make everyone use them. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: James Hogan <james.hogan@imgtec.com> Tested-by: James Hogan <james.hogan@imgtec.com> (metag)
Diffstat (limited to 'arch')
-rw-r--r--arch/Kconfig6
-rw-r--r--arch/blackfin/Kconfig5
-rw-r--r--arch/h8300/Kconfig5
-rw-r--r--arch/metag/Kconfig5
4 files changed, 9 insertions, 12 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 1455579791ec..7b433a4bcc28 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -384,6 +384,12 @@ config MODULES_USE_ELF_REL
Modules only use ELF REL relocations. Modules with ELF RELA
relocations will give an error.
+config HAVE_UNDERSCORE_SYMBOL_PREFIX
+ bool
+ help
+ Some architectures generate an _ in front of C symbols; things like
+ module loading and assembly files need to know about this.
+
#
# ABI hall of shame
#
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index c3f2e0bc644a..453ebe46b065 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -1,7 +1,3 @@
-config SYMBOL_PREFIX
- string
- default "_"
-
config MMU
def_bool n
@@ -33,6 +29,7 @@ config BLACKFIN
select ARCH_HAVE_CUSTOM_GPIO_H
select ARCH_WANT_OPTIONAL_GPIOLIB
select HAVE_UID16
+ select HAVE_UNDERSCORE_SYMBOL_PREFIX
select VIRT_TO_BUS
select ARCH_WANT_IPC_PARSE_VERSION
select HAVE_GENERIC_HARDIRQS
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 79250de1b12a..303e4f9a79d1 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -12,10 +12,7 @@ config H8300
select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3
select OLD_SIGACTION
-
-config SYMBOL_PREFIX
- string
- default "_"
+ select HAVE_UNDERSCORE_SYMBOL_PREFIX
config MMU
bool
diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index afc8973d1488..2099617e3ec0 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -1,7 +1,3 @@
-config SYMBOL_PREFIX
- string
- default "_"
-
config METAG
def_bool y
select EMBEDDED
@@ -27,6 +23,7 @@ config METAG
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_PERF_EVENTS
select HAVE_SYSCALL_TRACEPOINTS
+ select HAVE_UNDERSCORE_SYMBOL_PREFIX
select IRQ_DOMAIN
select MODULES_USE_ELF_RELA
select OF