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| author | Peter Oberparleiter <oberpar@linux.vnet.ibm.com> | 2009-06-18 01:28:03 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-18 22:03:57 +0200 |
| commit | b99b87f70c7785ab1e253c6220f4b0b57ce3a7f7 (patch) | |
| tree | ec5688052334448ec8edd3a1a9cb95cd68501ac7 /init | |
| parent | edac: Kconfig: fix the meaning of EDAC abbreviation (diff) | |
| download | linux-b99b87f70c7785ab1e253c6220f4b0b57ce3a7f7.tar.xz linux-b99b87f70c7785ab1e253c6220f4b0b57ce3a7f7.zip | |
kernel: constructor support
Call constructors (gcc-generated initcall-like functions) during kernel
start and module load. Constructors are e.g. used for gcov data
initialization.
Disable constructor support for usermode Linux to prevent conflicts with
host glibc.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Li Wei <W.Li@Sun.COM>
Cc: Michael Ellerman <michaele@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 5 | ||||
| -rw-r--r-- | init/main.c | 12 |
2 files changed, 17 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index c4b3c6d51a72..1ce05a4cb5f6 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -16,6 +16,11 @@ config DEFCONFIG_LIST default "$ARCH_DEFCONFIG" default "arch/$ARCH/defconfig" +config CONSTRUCTORS + bool + depends on !UML + default y + menu "General setup" config EXPERIMENTAL diff --git a/init/main.c b/init/main.c index 0e7aedeaa05f..1a65fdd06318 100644 --- a/init/main.c +++ b/init/main.c @@ -720,6 +720,17 @@ asmlinkage void __init start_kernel(void) rest_init(); } +/* Call all constructor functions linked into the kernel. */ +static void __init do_ctors(void) +{ +#ifdef CONFIG_CONSTRUCTORS + ctor_fn_t *call = (ctor_fn_t *) __ctors_start; + + for (; call < (ctor_fn_t *) __ctors_end; call++) + (*call)(); +#endif +} + int initcall_debug; core_param(initcall_debug, initcall_debug, bool, 0644); @@ -800,6 +811,7 @@ static void __init do_basic_setup(void) usermodehelper_init(); driver_init(); init_irq_proc(); + do_ctors(); do_initcalls(); } |