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Retire pmap_pinit2(). Alpha was the last platform that used it. However,

Browse Source 
ever since alpha/alpha/pmap.c revision 1.81 introduced the list allpmaps,
there has been no reason for having this function on Alpha.  Briefly,
when pmap_growkernel() relied upon the list of all processes to find and
update the various pmaps to reflect a growth in the kernel's valid
address space, pmap_init2() served to avoid a race between pmap
initialization and pmap_growkernel().  Specifically, pmap_pinit2() was
responsible for initializing the kernel portions of the pmap and
pmap_pinit2() was called after the process structure contained a pointer
to the new pmap for use by pmap_growkernel().  Thus, an update to the
kernel's address space might be applied to the new pmap unnecessarily,
but an update would never be lost.
This commit is contained in:
Alan Cox 2004-03-07 21:06:48 +00:00
parent 7594cde032
commit fcffa790e9
11 changed files with 0 additions and 79 deletions
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12
sys/alpha/alpha/pmap.c
View File

@ -1109,18 +1109,6 @@ pmap_pinit(pmap)
mtx_lock_spin(&allpmaps_lock);
LIST_INSERT_HEAD(&allpmaps, pmap, pm_list);
mtx_unlock_spin(&allpmaps_lock);
}
/*
* Wire in kernel global address entries. To avoid a race condition
* between pmap initialization and pmap_growkernel, this procedure
* should be called after the vmspace is attached to the process
* but before this pmap is activated.
*/
void
pmap_pinit2(pmap)
struct pmap *pmap;
{
bcopy(PTlev1 + K1SEGLEV1I, pmap->pm_lev1 + K1SEGLEV1I, nklev2 * PTESIZE);
}

13
sys/amd64/amd64/pmap.c
View File

@ -1102,19 +1102,6 @@ pmap_pinit(pmap)
bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
}
/*
* Wire in kernel global address entries. To avoid a race condition
* between pmap initialization and pmap_growkernel, this procedure
* should be called after the vmspace is attached to the process
* but before this pmap is activated.
*/
void
pmap_pinit2(pmap)
struct pmap *pmap;
{
/* XXX: Remove this stub when no longer called */
}
/*
* this routine is called if the page table page is not
* mapped correctly.

13
sys/i386/i386/pmap.c
View File

@ -1146,19 +1146,6 @@ pmap_pinit(pmap)
bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
}
/*
* Wire in kernel global address entries. To avoid a race condition
* between pmap initialization and pmap_growkernel, this procedure
* should be called after the vmspace is attached to the process
* but before this pmap is activated.
*/
void
pmap_pinit2(pmap)
struct pmap *pmap;
{
/* XXX: Remove this stub when no longer called */
}
/*
* this routine is called if the page table page is not
* mapped correctly.

11
sys/ia64/ia64/pmap.c
View File

@ -735,17 +735,6 @@ pmap_pinit(struct pmap *pmap)
bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
}
/*
* Wire in kernel global address entries. To avoid a race condition
* between pmap initialization and pmap_growkernel, this procedure
* should be called after the vmspace is attached to the process
* but before this pmap is activated.
*/
void
pmap_pinit2(struct pmap *pmap)
{
}
/***************************************************
* Pmap allocation/deallocation routines.
***************************************************/

6
sys/powerpc/aim/mmu_oea.c
View File

@ -1443,12 +1443,6 @@ pmap_pinit0(pmap_t pm)
bzero(&pm->pm_stats, sizeof(pm->pm_stats));
}
void
pmap_pinit2(pmap_t pmap)
{
/* XXX: Remove this stub when no longer called */
}
/*
* Set the physical protection on the specified range of this map as requested.
*/

6
sys/powerpc/powerpc/mmu_oea.c
View File

@ -1443,12 +1443,6 @@ pmap_pinit0(pmap_t pm)
bzero(&pm->pm_stats, sizeof(pm->pm_stats));
}
void
pmap_pinit2(pmap_t pmap)
{
/* XXX: Remove this stub when no longer called */
}
/*
* Set the physical protection on the specified range of this map as requested.
*/

6
sys/powerpc/powerpc/pmap.c
View File

@ -1443,12 +1443,6 @@ pmap_pinit0(pmap_t pm)
bzero(&pm->pm_stats, sizeof(pm->pm_stats));
}
void
pmap_pinit2(pmap_t pmap)
{
/* XXX: Remove this stub when no longer called */
}
/*
* Set the physical protection on the specified range of this map as requested.
*/

6
sys/sparc64/sparc64/pmap.c
View File

@ -1027,12 +1027,6 @@ pmap_pinit(pmap_t pm)
bzero(&pm->pm_stats, sizeof(pm->pm_stats));
}
void
pmap_pinit2(pmap_t pmap)
{
/* XXX: Remove this stub when no longer called */
}
/*
* Release any resources held by the given physical map.
* Called when a pmap initialized by pmap_pinit is being released.

1
sys/vm/pmap.h
View File

@ -120,7 +120,6 @@ boolean_t pmap_page_exists_quick(pmap_t pmap, vm_page_t m);
void pmap_page_protect(vm_page_t m, vm_prot_t prot);
void pmap_pinit(pmap_t);
void pmap_pinit0(pmap_t);
void pmap_pinit2(pmap_t);
void pmap_protect(pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
void pmap_qenter(vm_offset_t, vm_page_t *, int);
void pmap_qremove(vm_offset_t, int);

3
sys/vm/vm_glue.c
View File

@ -675,9 +675,6 @@ vm_forkproc(td, p2, td2, flags)
if ((flags & RFMEM) == 0) {
p2->p_vmspace = vmspace_fork(p1->p_vmspace);
pmap_pinit2(vmspace_pmap(p2->p_vmspace));
if (p1->p_vmspace->vm_shm)
shmfork(p1, p2);
}

2
sys/vm/vm_map.c
View File

@ -2798,7 +2798,6 @@ vmspace_exec(struct proc *p, vm_offset_t minuser, vm_offset_t maxuser)
* here, it is a good idea to keep this form for future mods.
*/
p->p_vmspace = newvmspace;
pmap_pinit2(vmspace_pmap(newvmspace));
if (p == curthread->td_proc) /* XXXKSE ? */
pmap_activate(curthread);
vmspace_free(oldvmspace);
@ -2819,7 +2818,6 @@ vmspace_unshare(struct proc *p)
return;
newvmspace = vmspace_fork(oldvmspace);
p->p_vmspace = newvmspace;
pmap_pinit2(vmspace_pmap(newvmspace));
if (p == curthread->td_proc) /* XXXKSE ? */
pmap_activate(curthread);
vmspace_free(oldvmspace);