Messages in this thread Patch in this message | | | From | Benjamin Herrenschmidt <> | Date | Fri, 18 Apr 2008 16:56:15 +1000 | Subject | [PATCH 1/3] Add thread_info_cache_init() weak hook |
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Some architecture need to maintain a kmem cache for thread info structures. (next patch adds that to powerpc to fix an alignment problem).
There is no good arch callback to use to initialize that cache that I can find, so this adds a new one in the form of a weak function whose default is empty.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> ---
include/linux/sched.h | 2 ++ init/main.c | 5 +++++ 2 files changed, 7 insertions(+)
--- linux-work.orig/init/main.c 2008-03-26 10:39:25.000000000 +1100 +++ linux-work/init/main.c 2008-04-18 16:43:53.000000000 +1000 @@ -504,6 +504,10 @@ void __init __attribute__((weak)) smp_se { } +void __init __weak thread_info_cache_init(void) +{ +} + asmlinkage void __init start_kernel(void) { char * command_line; @@ -623,6 +627,7 @@ asmlinkage void __init start_kernel(void if (efi_enabled) efi_enter_virtual_mode(); #endif + thread_info_cache_init(); fork_init(num_physpages); proc_caches_init(); buffer_init(); Index: linux-work/include/linux/sched.h =================================================================== --- linux-work.orig/include/linux/sched.h 2008-04-02 09:47:56.000000000 +1100 +++ linux-work/include/linux/sched.h 2008-04-18 13:11:10.000000000 +1000 @@ -1893,6 +1893,8 @@ static inline unsigned long *end_of_stac #endif +extern void thread_info_cache_init(void); + /* set thread flags in other task's structures * - see asm/thread_info.h for TIF_xxxx flags available */
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