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powerpc: Remove unused paca->pgdir field

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The pgdir field in the paca was a leftover from the dynamic VSIDs
patch, and is not used in the current kernel code.  This removes it.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras 2006-06-12 18:38:21 +10:00
parent 7a0c58d051
commit 4306443128
5 changed files with 0 additions and 25 deletions
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3
arch/powerpc/kernel/asm-offsets.c
View File

@ -122,9 +122,6 @@ int main(void)
DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
#ifdef CONFIG_PPC_64K_PAGES
DEFINE(PACAPGDIR, offsetof(struct paca_struct, pgdir));
#endif
#ifdef CONFIG_HUGETLB_PAGE
DEFINE(PACALOWHTLBAREAS, offsetof(struct paca_struct, context.low_htlb_areas));
DEFINE(PACAHIGHHTLBAREAS, offsetof(struct paca_struct, context.high_htlb_areas));

3
arch/powerpc/mm/slb.c
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@ -122,9 +122,6 @@ void switch_slb(struct task_struct *tsk, struct mm_struct *mm)
get_paca()->slb_cache_ptr = 0;
get_paca()->context = mm->context;
#ifdef CONFIG_PPC_64K_PAGES
get_paca()->pgdir = mm->pgd;
#endif /* CONFIG_PPC_64K_PAGES */
/*
* preload some userspace segments into the SLB.

4
arch/powerpc/mm/stab.c
View File

@ -200,10 +200,6 @@ void switch_stab(struct task_struct *tsk, struct mm_struct *mm)
__get_cpu_var(stab_cache_ptr) = 0;
#ifdef CONFIG_PPC_64K_PAGES
get_paca()->pgdir = mm->pgd;
#endif /* CONFIG_PPC_64K_PAGES */
/* Now preload some entries for the new task */
if (test_tsk_thread_flag(tsk, TIF_32BIT))
unmapped_base = TASK_UNMAPPED_BASE_USER32;

12
include/asm-powerpc/mmu_context.h
View File

@ -20,16 +20,9 @@
* 2 of the License, or (at your option) any later version.
*/
/*
* Getting into a kernel thread, there is no valid user segment, mark
* paca->pgdir NULL so that SLB miss on user addresses will fault
*/
static inline void enter_lazy_tlb(struct mm_struct *mm,
struct task_struct *tsk)
{
#ifdef CONFIG_PPC_64K_PAGES
get_paca()->pgdir = NULL;
#endif /* CONFIG_PPC_64K_PAGES */
}
#define NO_CONTEXT 0
@ -52,13 +45,8 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
cpu_set(smp_processor_id(), next->cpu_vm_mask);
/* No need to flush userspace segments if the mm doesnt change */
#ifdef CONFIG_PPC_64K_PAGES
if (prev == next && get_paca()->pgdir == next->pgd)
return;
#else
if (prev == next)
return;
#endif /* CONFIG_PPC_64K_PAGES */
#ifdef CONFIG_ALTIVEC
if (cpu_has_feature(CPU_FTR_ALTIVEC))

3
include/asm-powerpc/paca.h
View File

@ -79,9 +79,6 @@ struct paca_struct {
u64 exmc[10]; /* used for machine checks */
u64 exslb[10]; /* used for SLB/segment table misses
* on the linear mapping */
#ifdef CONFIG_PPC_64K_PAGES
pgd_t *pgdir;
#endif /* CONFIG_PPC_64K_PAGES */
mm_context_t context;
u16 slb_cache[SLB_CACHE_ENTRIES];