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 and adds an empty macro
for when it's not implemented.
Signed-off-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
---
So we have the choice here between:
- the ifdef on the func name that I did, consistent with what
I did before for iomap, which iirc Linus liked
- add some more ARCH_HAS_* or HAVE_* (yuck)
- add an empty definition to all archs .h (pain in the neck but I
can do it, though it will be an annoying patch to keep around)
- do a weak function (will slightly bloat everybody for no good reason)
So unless there is strong complaints, I'd like to stick to my
current approach.
include/linux/sched.h | 4 ++++
init/main.c | 1 +
2 files changed, 5 insertions(+)
--- linux-work.orig/init/main.c 2008-04-10 13:11:06.000000000 +1000
+++ linux-work/init/main.c 2008-04-10 13:11:19.000000000 +1000
@@ -623,6 +623,7 @@ 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 2008-04-10 13:11:44.000000000
+1000
+++ linux-work/include/linux/sched.h 2008-04-10 13:12:05.000000000 +1000
@@ -1893,6 +1893,10 @@ static inline unsigned long *end_of_stac
#endif
+#ifndef thread_info_cache_init
+#define thread_info_cache_init do { } while(0)
+#endif
+
/* set thread flags in other task's structures
* - see asm/thread_info.h for TIF_xxxx flags available
*/
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
