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Commit 8c9843e5 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Paul Mackerras
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[POWERPC] Add thread_info_cache_init() weak hook 



Some architectures need to maintain a kmem cache for thread info
structures.  The next commit 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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 1d32e218

include/linux/sched.h

+2 −0
Original line number Diff line number Diff line
@@ -1926,6 +1926,8 @@ static inline unsigned long *end_of_stack(struct task_struct *p) 


#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

 */

init/main.c

+5 −0
Original line number Diff line number Diff line
@@ -525,6 +525,10 @@ void __init __attribute__((weak)) smp_setup_processor_id(void) 
{

}



void __init __weak thread_info_cache_init(void)

{

}



asmlinkage void __init start_kernel(void)

{

	char * command_line;
@@ -645,6 +649,7 @@ 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();