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mm: provide init_mm mm_context initializer

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Provide an INIT_MM_CONTEXT intializer macro which can be used to
statically initialize mm_struct:mm_context of init_mm.  This way we can
get rid of code which will do the initialization at run time (on s390).

In addition the current code can be found at a place where it is not
expected.  So let's have a common initializer which architectures
can use if needed.

This is based on a patch from Suzuki Poulose.

Signed-off-by: Heiko Carstens <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Suzuki Poulose <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Heiko Carstens 2010-08-09 17:18:28 -07:00 • committed by Linus Torvalds
commit a1b200e27c
3 changed files with 11 additions and 4 deletions
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6
mm/init-mm.c
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@ -7,6 +7,11 @@
#include <asm/atomic.h>
#include <asm/pgtable.h>
#include <asm/mmu.h>
#ifndef INIT_MM_CONTEXT
#define INIT_MM_CONTEXT(name)
#endif
struct mm_struct init_mm = {
.mm_rb = RB_ROOT,
@ -17,4 +22,5 @@ struct mm_struct init_mm = {
.page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock),
.mmlist = LIST_HEAD_INIT(init_mm.mmlist),
.cpu_vm_mask = CPU_MASK_ALL,
INIT_MM_CONTEXT(init_mm)
};