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[POWERPC] Minor paca optimisation

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Move the slb_shadow_ptr field into the first cache line since it is
(like everything there) read-only after boot.  It is in fact statically
initialised and thereafter only read.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Stephen Rothwell 2007-03-16 17:47:07 +11:00 committed by Paul Mackerras
parent 0e6806734f
commit e91948fd84
1 changed files with 1 additions and 2 deletions
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3
include/asm-powerpc/paca.h
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@ -70,6 +70,7 @@ struct paca_struct {
s16 hw_cpu_id; /* Physical processor number */
u8 cpu_start; /* At startup, processor spins until */
/* this becomes non-zero. */
struct slb_shadow *slb_shadow_ptr;
/*
* Now, starting in cacheline 2, the exception save areas
@ -101,8 +102,6 @@ struct paca_struct {
u64 user_time; /* accumulated usermode TB ticks */
u64 system_time; /* accumulated system TB ticks */
u64 startpurr; /* PURR/TB value snapshot */
struct slb_shadow *slb_shadow_ptr;
};
extern struct paca_struct paca[];