Commit 8434f089 authored by Michael Ellerman's avatar Michael Ellerman

Merge branch 'topic/ppc-kvm' into next

Bring in the commit to rename find_linux_pte_or_hugepte() which touches
arch and KVM code, and might need to be merged with the kvmppc tree to
avoid conflicts.
parents 6acdc9a6 94171b19
...@@ -66,16 +66,8 @@ extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr, ...@@ -66,16 +66,8 @@ extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
#ifndef CONFIG_TRANSPARENT_HUGEPAGE #ifndef CONFIG_TRANSPARENT_HUGEPAGE
#define pmd_large(pmd) 0 #define pmd_large(pmd) 0
#endif #endif
pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *shift);
static inline pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *shift)
{
VM_WARN(!arch_irqs_disabled(),
"%s called with irq enabled\n", __func__);
return __find_linux_pte_or_hugepte(pgdir, ea, is_thp, shift);
}
/* can we use this in kvm */
unsigned long vmalloc_to_phys(void *vmalloc_addr); unsigned long vmalloc_to_phys(void *vmalloc_addr);
void pgtable_cache_add(unsigned shift, void (*ctor)(void *)); void pgtable_cache_add(unsigned shift, void (*ctor)(void *));
......
#ifndef _ASM_POWERPC_PTE_WALK_H
#define _ASM_POWERPC_PTE_WALK_H
#include <linux/sched.h>
/* Don't use this directly */
extern pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *hshift);
static inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *hshift)
{
VM_WARN(!arch_irqs_disabled(), "%s called with irq enabled\n", __func__);
return __find_linux_pte(pgdir, ea, is_thp, hshift);
}
static inline pte_t *find_init_mm_pte(unsigned long ea, unsigned *hshift)
{
pgd_t *pgdir = init_mm.pgd;
return __find_linux_pte(pgdir, ea, NULL, hshift);
}
/*
* This is what we should always use. Any other lockless page table lookup needs
* careful audit against THP split.
*/
static inline pte_t *find_current_mm_pte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *hshift)
{
VM_WARN(!arch_irqs_disabled(), "%s called with irq enabled\n", __func__);
VM_WARN(pgdir != current->mm->pgd,
"%s lock less page table lookup called on wrong mm\n", __func__);
return __find_linux_pte(pgdir, ea, is_thp, hshift);
}
#endif /* _ASM_POWERPC_PTE_WALK_H */
...@@ -44,6 +44,7 @@ ...@@ -44,6 +44,7 @@
#include <asm/machdep.h> #include <asm/machdep.h>
#include <asm/ppc-pci.h> #include <asm/ppc-pci.h>
#include <asm/rtas.h> #include <asm/rtas.h>
#include <asm/pte-walk.h>
/** Overview: /** Overview:
...@@ -352,8 +353,7 @@ static inline unsigned long eeh_token_to_phys(unsigned long token) ...@@ -352,8 +353,7 @@ static inline unsigned long eeh_token_to_phys(unsigned long token)
* worried about _PAGE_SPLITTING/collapse. Also we will not hit * worried about _PAGE_SPLITTING/collapse. Also we will not hit
* page table free, because of init_mm. * page table free, because of init_mm.
*/ */
ptep = __find_linux_pte_or_hugepte(init_mm.pgd, token, ptep = find_init_mm_pte(token, &hugepage_shift);
NULL, &hugepage_shift);
if (!ptep) if (!ptep)
return token; return token;
WARN_ON(hugepage_shift); WARN_ON(hugepage_shift);
......
...@@ -19,6 +19,8 @@ ...@@ -19,6 +19,8 @@
#include <asm/pgtable.h> #include <asm/pgtable.h>
#include <asm/ppc-pci.h> #include <asm/ppc-pci.h>
#include <asm/io-workarounds.h> #include <asm/io-workarounds.h>
#include <asm/pte-walk.h>
#define IOWA_MAX_BUS 8 #define IOWA_MAX_BUS 8
...@@ -75,8 +77,7 @@ struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr) ...@@ -75,8 +77,7 @@ struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
* We won't find huge pages here (iomem). Also can't hit * We won't find huge pages here (iomem). Also can't hit
* a page table free due to init_mm * a page table free due to init_mm
*/ */
ptep = __find_linux_pte_or_hugepte(init_mm.pgd, vaddr, ptep = find_init_mm_pte(vaddr, &hugepage_shift);
NULL, &hugepage_shift);
if (ptep == NULL) if (ptep == NULL)
paddr = 0; paddr = 0;
else { else {
......
...@@ -37,6 +37,7 @@ ...@@ -37,6 +37,7 @@
#include <asm/synch.h> #include <asm/synch.h>
#include <asm/ppc-opcode.h> #include <asm/ppc-opcode.h>
#include <asm/cputable.h> #include <asm/cputable.h>
#include <asm/pte-walk.h>
#include "trace_hv.h" #include "trace_hv.h"
...@@ -597,8 +598,8 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, ...@@ -597,8 +598,8 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
* hugepage split and collapse. * hugepage split and collapse.
*/ */
local_irq_save(flags); local_irq_save(flags);
ptep = find_linux_pte_or_hugepte(current->mm->pgd, ptep = find_current_mm_pte(current->mm->pgd,
hva, NULL, NULL); hva, NULL, NULL);
if (ptep) { if (ptep) {
pte = kvmppc_read_update_linux_pte(ptep, 1); pte = kvmppc_read_update_linux_pte(ptep, 1);
if (__pte_write(pte)) if (__pte_write(pte))
......
...@@ -17,6 +17,7 @@ ...@@ -17,6 +17,7 @@
#include <asm/mmu.h> #include <asm/mmu.h>
#include <asm/pgtable.h> #include <asm/pgtable.h>
#include <asm/pgalloc.h> #include <asm/pgalloc.h>
#include <asm/pte-walk.h>
/* /*
* Supported radix tree geometry. * Supported radix tree geometry.
...@@ -359,8 +360,7 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, ...@@ -359,8 +360,7 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
if (writing) if (writing)
pgflags |= _PAGE_DIRTY; pgflags |= _PAGE_DIRTY;
local_irq_save(flags); local_irq_save(flags);
ptep = __find_linux_pte_or_hugepte(current->mm->pgd, hva, ptep = find_current_mm_pte(current->mm->pgd, hva, NULL, NULL);
NULL, NULL);
if (ptep) { if (ptep) {
pte = READ_ONCE(*ptep); pte = READ_ONCE(*ptep);
if (pte_present(pte) && if (pte_present(pte) &&
...@@ -374,8 +374,12 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, ...@@ -374,8 +374,12 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
spin_unlock(&kvm->mmu_lock); spin_unlock(&kvm->mmu_lock);
return RESUME_GUEST; return RESUME_GUEST;
} }
ptep = __find_linux_pte_or_hugepte(kvm->arch.pgtable, /*
gpa, NULL, &shift); * We are walking the secondary page table here. We can do this
* without disabling irq.
*/
ptep = __find_linux_pte(kvm->arch.pgtable,
gpa, NULL, &shift);
if (ptep && pte_present(*ptep)) { if (ptep && pte_present(*ptep)) {
kvmppc_radix_update_pte(kvm, ptep, 0, pgflags, kvmppc_radix_update_pte(kvm, ptep, 0, pgflags,
gpa, shift); gpa, shift);
...@@ -427,8 +431,8 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, ...@@ -427,8 +431,8 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
pgflags |= _PAGE_WRITE; pgflags |= _PAGE_WRITE;
} else { } else {
local_irq_save(flags); local_irq_save(flags);
ptep = __find_linux_pte_or_hugepte(current->mm->pgd, ptep = find_current_mm_pte(current->mm->pgd,
hva, NULL, NULL); hva, NULL, NULL);
if (ptep && pte_write(*ptep) && pte_dirty(*ptep)) if (ptep && pte_write(*ptep) && pte_dirty(*ptep))
pgflags |= _PAGE_WRITE; pgflags |= _PAGE_WRITE;
local_irq_restore(flags); local_irq_restore(flags);
...@@ -499,8 +503,7 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, ...@@ -499,8 +503,7 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
unsigned int shift; unsigned int shift;
unsigned long old; unsigned long old;
ptep = __find_linux_pte_or_hugepte(kvm->arch.pgtable, gpa, ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
NULL, &shift);
if (ptep && pte_present(*ptep)) { if (ptep && pte_present(*ptep)) {
old = kvmppc_radix_update_pte(kvm, ptep, _PAGE_PRESENT, 0, old = kvmppc_radix_update_pte(kvm, ptep, _PAGE_PRESENT, 0,
gpa, shift); gpa, shift);
...@@ -525,8 +528,7 @@ int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, ...@@ -525,8 +528,7 @@ int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
unsigned int shift; unsigned int shift;
int ref = 0; int ref = 0;
ptep = __find_linux_pte_or_hugepte(kvm->arch.pgtable, gpa, ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
NULL, &shift);
if (ptep && pte_present(*ptep) && pte_young(*ptep)) { if (ptep && pte_present(*ptep) && pte_young(*ptep)) {
kvmppc_radix_update_pte(kvm, ptep, _PAGE_ACCESSED, 0, kvmppc_radix_update_pte(kvm, ptep, _PAGE_ACCESSED, 0,
gpa, shift); gpa, shift);
...@@ -545,8 +547,7 @@ int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, ...@@ -545,8 +547,7 @@ int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
unsigned int shift; unsigned int shift;
int ref = 0; int ref = 0;
ptep = __find_linux_pte_or_hugepte(kvm->arch.pgtable, gpa, ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
NULL, &shift);
if (ptep && pte_present(*ptep) && pte_young(*ptep)) if (ptep && pte_present(*ptep) && pte_young(*ptep))
ref = 1; ref = 1;
return ref; return ref;
...@@ -562,8 +563,7 @@ static int kvm_radix_test_clear_dirty(struct kvm *kvm, ...@@ -562,8 +563,7 @@ static int kvm_radix_test_clear_dirty(struct kvm *kvm,
unsigned int shift; unsigned int shift;
int ret = 0; int ret = 0;
ptep = __find_linux_pte_or_hugepte(kvm->arch.pgtable, gpa, ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
NULL, &shift);
if (ptep && pte_present(*ptep) && pte_dirty(*ptep)) { if (ptep && pte_present(*ptep) && pte_dirty(*ptep)) {
ret = 1; ret = 1;
if (shift) if (shift)
......
...@@ -39,6 +39,7 @@ ...@@ -39,6 +39,7 @@
#include <asm/udbg.h> #include <asm/udbg.h>
#include <asm/iommu.h> #include <asm/iommu.h>
#include <asm/tce.h> #include <asm/tce.h>
#include <asm/pte-walk.h>
#ifdef CONFIG_BUG #ifdef CONFIG_BUG
...@@ -353,7 +354,16 @@ static long kvmppc_rm_ua_to_hpa(struct kvm_vcpu *vcpu, ...@@ -353,7 +354,16 @@ static long kvmppc_rm_ua_to_hpa(struct kvm_vcpu *vcpu,
pte_t *ptep, pte; pte_t *ptep, pte;
unsigned shift = 0; unsigned shift = 0;
ptep = __find_linux_pte_or_hugepte(vcpu->arch.pgdir, ua, NULL, &shift); /*
* Called in real mode with MSR_EE = 0. We are safe here.
* It is ok to do the lookup with arch.pgdir here, because
* we are doing this on secondary cpus and current task there
* is not the hypervisor. Also this is safe against THP in the
* host, because an IPI to primary thread will wait for the secondary
* to exit which will agains result in the below page table walk
* to finish.
*/
ptep = __find_linux_pte(vcpu->arch.pgdir, ua, NULL, &shift);
if (!ptep || !pte_present(*ptep)) if (!ptep || !pte_present(*ptep))
return -ENXIO; return -ENXIO;
pte = *ptep; pte = *ptep;
......
...@@ -22,6 +22,7 @@ ...@@ -22,6 +22,7 @@
#include <asm/hvcall.h> #include <asm/hvcall.h>
#include <asm/synch.h> #include <asm/synch.h>
#include <asm/ppc-opcode.h> #include <asm/ppc-opcode.h>
#include <asm/pte-walk.h>
/* Translate address of a vmalloc'd thing to a linear map address */ /* Translate address of a vmalloc'd thing to a linear map address */
static void *real_vmalloc_addr(void *x) static void *real_vmalloc_addr(void *x)
...@@ -31,9 +32,9 @@ static void *real_vmalloc_addr(void *x) ...@@ -31,9 +32,9 @@ static void *real_vmalloc_addr(void *x)
/* /*
* assume we don't have huge pages in vmalloc space... * assume we don't have huge pages in vmalloc space...
* So don't worry about THP collapse/split. Called * So don't worry about THP collapse/split. Called
* Only in realmode, hence won't need irq_save/restore. * Only in realmode with MSR_EE = 0, hence won't need irq_save/restore.
*/ */
p = __find_linux_pte_or_hugepte(swapper_pg_dir, addr, NULL, NULL); p = find_init_mm_pte(addr, NULL);
if (!p || !pte_present(*p)) if (!p || !pte_present(*p))
return NULL; return NULL;
addr = (pte_pfn(*p) << PAGE_SHIFT) | (addr & ~PAGE_MASK); addr = (pte_pfn(*p) << PAGE_SHIFT) | (addr & ~PAGE_MASK);
...@@ -230,14 +231,13 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, ...@@ -230,14 +231,13 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
* If we had a page table table change after lookup, we would * If we had a page table table change after lookup, we would
* retry via mmu_notifier_retry. * retry via mmu_notifier_retry.
*/ */
if (realmode) if (!realmode)
ptep = __find_linux_pte_or_hugepte(pgdir, hva, NULL,
&hpage_shift);
else {
local_irq_save(irq_flags); local_irq_save(irq_flags);
ptep = find_linux_pte_or_hugepte(pgdir, hva, NULL, /*
&hpage_shift); * If called in real mode we have MSR_EE = 0. Otherwise
} * we disable irq above.
*/
ptep = __find_linux_pte(pgdir, hva, NULL, &hpage_shift);
if (ptep) { if (ptep) {
pte_t pte; pte_t pte;
unsigned int host_pte_size; unsigned int host_pte_size;
......
...@@ -30,6 +30,7 @@ ...@@ -30,6 +30,7 @@
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/hugetlb.h> #include <linux/hugetlb.h>
#include <asm/kvm_ppc.h> #include <asm/kvm_ppc.h>
#include <asm/pte-walk.h>
#include "e500.h" #include "e500.h"
#include "timing.h" #include "timing.h"
...@@ -476,7 +477,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, ...@@ -476,7 +477,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
* can't run hence pfn won't change. * can't run hence pfn won't change.
*/ */
local_irq_save(flags); local_irq_save(flags);
ptep = find_linux_pte_or_hugepte(pgdir, hva, NULL, NULL); ptep = find_linux_pte(pgdir, hva, NULL, NULL);
if (ptep) { if (ptep) {
pte_t pte = READ_ONCE(*ptep); pte_t pte = READ_ONCE(*ptep);
......
...@@ -61,6 +61,7 @@ ...@@ -61,6 +61,7 @@
#include <asm/tm.h> #include <asm/tm.h>
#include <asm/trace.h> #include <asm/trace.h>
#include <asm/ps3.h> #include <asm/ps3.h>
#include <asm/pte-walk.h>
#ifdef DEBUG #ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt) #define DBG(fmt...) udbg_printf(fmt)
...@@ -1298,7 +1299,7 @@ int hash_page_mm(struct mm_struct *mm, unsigned long ea, ...@@ -1298,7 +1299,7 @@ int hash_page_mm(struct mm_struct *mm, unsigned long ea,
#endif /* CONFIG_PPC_64K_PAGES */ #endif /* CONFIG_PPC_64K_PAGES */
/* Get PTE and page size from page tables */ /* Get PTE and page size from page tables */
ptep = __find_linux_pte_or_hugepte(pgdir, ea, &is_thp, &hugeshift); ptep = find_linux_pte(pgdir, ea, &is_thp, &hugeshift);
if (ptep == NULL || !pte_present(*ptep)) { if (ptep == NULL || !pte_present(*ptep)) {
DBG_LOW(" no PTE !\n"); DBG_LOW(" no PTE !\n");
rc = 1; rc = 1;
...@@ -1527,7 +1528,7 @@ void hash_preload(struct mm_struct *mm, unsigned long ea, ...@@ -1527,7 +1528,7 @@ void hash_preload(struct mm_struct *mm, unsigned long ea,
* THP pages use update_mmu_cache_pmd. We don't do * THP pages use update_mmu_cache_pmd. We don't do
* hash preload there. Hence can ignore THP here * hash preload there. Hence can ignore THP here
*/ */
ptep = find_linux_pte_or_hugepte(pgdir, ea, NULL, &hugepage_shift); ptep = find_current_mm_pte(pgdir, ea, NULL, &hugepage_shift);
if (!ptep) if (!ptep)
goto out_exit; goto out_exit;
......
...@@ -24,6 +24,8 @@ ...@@ -24,6 +24,8 @@
#include <asm/tlb.h> #include <asm/tlb.h>
#include <asm/setup.h> #include <asm/setup.h>
#include <asm/hugetlb.h> #include <asm/hugetlb.h>
#include <asm/pte-walk.h>
#ifdef CONFIG_HUGETLB_PAGE #ifdef CONFIG_HUGETLB_PAGE
...@@ -40,8 +42,11 @@ EXPORT_SYMBOL(HPAGE_SHIFT); ...@@ -40,8 +42,11 @@ EXPORT_SYMBOL(HPAGE_SHIFT);
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, unsigned long sz) pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, unsigned long sz)
{ {
/* Only called for hugetlbfs pages, hence can ignore THP */ /*
return __find_linux_pte_or_hugepte(mm->pgd, addr, NULL, NULL); * Only called for hugetlbfs pages, hence can ignore THP and the
* irq disabled walk.
*/
return __find_linux_pte(mm->pgd, addr, NULL, NULL);
} }
static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp, static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
...@@ -749,9 +754,8 @@ void flush_dcache_icache_hugepage(struct page *page) ...@@ -749,9 +754,8 @@ void flush_dcache_icache_hugepage(struct page *page)
* This function need to be called with interrupts disabled. We use this variant * This function need to be called with interrupts disabled. We use this variant
* when we have MSR[EE] = 0 but the paca->soft_enabled = 1 * when we have MSR[EE] = 0 but the paca->soft_enabled = 1
*/ */
pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, bool *is_thp, unsigned *hpage_shift)
bool *is_thp, unsigned *shift)
{ {
pgd_t pgd, *pgdp; pgd_t pgd, *pgdp;
pud_t pud, *pudp; pud_t pud, *pudp;
...@@ -760,8 +764,8 @@ pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, ...@@ -760,8 +764,8 @@ pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
hugepd_t *hpdp = NULL; hugepd_t *hpdp = NULL;
unsigned pdshift = PGDIR_SHIFT; unsigned pdshift = PGDIR_SHIFT;
if (shift) if (hpage_shift)
*shift = 0; *hpage_shift = 0;
if (is_thp) if (is_thp)
*is_thp = false; *is_thp = false;
...@@ -831,11 +835,11 @@ pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, ...@@ -831,11 +835,11 @@ pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
ret_pte = hugepte_offset(*hpdp, ea, pdshift); ret_pte = hugepte_offset(*hpdp, ea, pdshift);
pdshift = hugepd_shift(*hpdp); pdshift = hugepd_shift(*hpdp);
out: out:
if (shift) if (hpage_shift)
*shift = pdshift; *hpage_shift = pdshift;
return ret_pte; return ret_pte;
} }
EXPORT_SYMBOL_GPL(__find_linux_pte_or_hugepte); EXPORT_SYMBOL_GPL(__find_linux_pte);
int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr, int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
unsigned long end, int write, struct page **pages, int *nr) unsigned long end, int write, struct page **pages, int *nr)
......
...@@ -29,6 +29,8 @@ ...@@ -29,6 +29,8 @@
#include <asm/tlbflush.h> #include <asm/tlbflush.h>
#include <asm/tlb.h> #include <asm/tlb.h>
#include <asm/bug.h> #include <asm/bug.h>
#include <asm/pte-walk.h>
#include <trace/events/thp.h> #include <trace/events/thp.h>
...@@ -207,8 +209,8 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start, ...@@ -207,8 +209,8 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
local_irq_save(flags); local_irq_save(flags);
arch_enter_lazy_mmu_mode(); arch_enter_lazy_mmu_mode();
for (; start < end; start += PAGE_SIZE) { for (; start < end; start += PAGE_SIZE) {
pte_t *ptep = find_linux_pte_or_hugepte(mm->pgd, start, &is_thp, pte_t *ptep = find_current_mm_pte(mm->pgd, start, &is_thp,
&hugepage_shift); &hugepage_shift);
unsigned long pte; unsigned long pte;
if (ptep == NULL) if (ptep == NULL)
......
...@@ -22,6 +22,7 @@ ...@@ -22,6 +22,7 @@
#ifdef CONFIG_PPC64 #ifdef CONFIG_PPC64
#include "../kernel/ppc32.h" #include "../kernel/ppc32.h"
#endif #endif
#include <asm/pte-walk.h>
/* /*
...@@ -127,7 +128,7 @@ static int read_user_stack_slow(void __user *ptr, void *buf, int nb) ...@@ -127,7 +128,7 @@ static int read_user_stack_slow(void __user *ptr, void *buf, int nb)
return -EFAULT; return -EFAULT;
local_irq_save(flags); local_irq_save(flags);
ptep = find_linux_pte_or_hugepte(pgdir, addr, NULL, &shift); ptep = find_current_mm_pte(pgdir, addr, NULL, &shift);
if (!ptep) if (!ptep)
goto err_out; goto err_out;
if (!shift) if (!shift)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment