mm: cleanup *pte_alloc* interfaces
There are few things about *pte_alloc*() helpers worth cleaning up:
- 'vma' argument is unused, let's drop it;
- most __pte_alloc() callers do speculative check for pmd_none(),
before taking ptl: let's introduce pte_alloc() macro which does
the check.
The only direct user of __pte_alloc left is userfaultfd, which has
different expectation about atomicity wrt pmd.
- pte_alloc_map() and pte_alloc_map_lock() are redefined using
pte_alloc().
[sudeep.holla@arm.com: fix build for arm64 hugetlbpage]
[sfr@canb.auug.org.au: fix arch/arm/mm/mmu.c some more]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 434d76f..88fbe0d 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -732,7 +732,7 @@
return ptr;
}
-static pte_t * __init pte_alloc(pmd_t *pmd, unsigned long addr,
+static pte_t * __init arm_pte_alloc(pmd_t *pmd, unsigned long addr,
unsigned long prot,
void *(*alloc)(unsigned long sz))
{
@@ -747,7 +747,7 @@
static pte_t * __init early_pte_alloc(pmd_t *pmd, unsigned long addr,
unsigned long prot)
{
- return pte_alloc(pmd, addr, prot, early_alloc);
+ return arm_pte_alloc(pmd, addr, prot, early_alloc);
}
static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr,
@@ -756,7 +756,7 @@
void *(*alloc)(unsigned long sz),
bool ng)
{
- pte_t *pte = pte_alloc(pmd, addr, type->prot_l1, alloc);
+ pte_t *pte = arm_pte_alloc(pmd, addr, type->prot_l1, alloc);
do {
set_pte_ext(pte, pfn_pte(pfn, __pgprot(type->prot_pte)),
ng ? PTE_EXT_NG : 0);
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c
index e683db1..b8d4773 100644
--- a/arch/arm/mm/pgd.c
+++ b/arch/arm/mm/pgd.c
@@ -80,7 +80,7 @@
if (!new_pmd)
goto no_pmd;
- new_pte = pte_alloc_map(mm, NULL, new_pmd, 0);
+ new_pte = pte_alloc_map(mm, new_pmd, 0);
if (!new_pte)
goto no_pte;
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index da30529..589fd28 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -124,7 +124,7 @@
* will be no pte_unmap() to correspond with this
* pte_alloc_map().
*/
- pte = pte_alloc_map(mm, NULL, pmd, addr);
+ pte = pte_alloc_map(mm, pmd, addr);
} else if (sz == PMD_SIZE) {
if (IS_ENABLED(CONFIG_ARCH_WANT_HUGE_PMD_SHARE) &&
pud_none(*pud))
diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index f50d4b3..85de86d 100644
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c
@@ -38,7 +38,7 @@
if (pud) {
pmd = pmd_alloc(mm, pud, taddr);
if (pmd)
- pte = pte_alloc_map(mm, NULL, pmd, taddr);
+ pte = pte_alloc_map(mm, pmd, taddr);
}
return pte;
}
diff --git a/arch/metag/mm/hugetlbpage.c b/arch/metag/mm/hugetlbpage.c
index 53f0f6c..b38700ae 100644
--- a/arch/metag/mm/hugetlbpage.c
+++ b/arch/metag/mm/hugetlbpage.c
@@ -67,7 +67,7 @@
pgd = pgd_offset(mm, addr);
pud = pud_offset(pgd, addr);
pmd = pmd_offset(pud, addr);
- pte = pte_alloc_map(mm, NULL, pmd, addr);
+ pte = pte_alloc_map(mm, pmd, addr);
pgd->pgd &= ~_PAGE_SZ_MASK;
pgd->pgd |= _PAGE_SZHUGE;
diff --git a/arch/parisc/mm/hugetlbpage.c b/arch/parisc/mm/hugetlbpage.c
index 54ba392..5d6eea9 100644
--- a/arch/parisc/mm/hugetlbpage.c
+++ b/arch/parisc/mm/hugetlbpage.c
@@ -63,7 +63,7 @@
if (pud) {
pmd = pmd_alloc(mm, pud, addr);
if (pmd)
- pte = pte_alloc_map(mm, NULL, pmd, addr);
+ pte = pte_alloc_map(mm, pmd, addr);
}
return pte;
}
diff --git a/arch/sh/mm/hugetlbpage.c b/arch/sh/mm/hugetlbpage.c
index 6385f60..cc948db 100644
--- a/arch/sh/mm/hugetlbpage.c
+++ b/arch/sh/mm/hugetlbpage.c
@@ -35,7 +35,7 @@
if (pud) {
pmd = pmd_alloc(mm, pud, addr);
if (pmd)
- pte = pte_alloc_map(mm, NULL, pmd, addr);
+ pte = pte_alloc_map(mm, pmd, addr);
}
}
diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
index 131eaf4..4977800 100644
--- a/arch/sparc/mm/hugetlbpage.c
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -146,7 +146,7 @@
if (pud) {
pmd = pmd_alloc(mm, pud, addr);
if (pmd)
- pte = pte_alloc_map(mm, NULL, pmd, addr);
+ pte = pte_alloc_map(mm, pmd, addr);
}
return pte;
}
diff --git a/arch/tile/mm/hugetlbpage.c b/arch/tile/mm/hugetlbpage.c
index c034dc3..e212c64 100644
--- a/arch/tile/mm/hugetlbpage.c
+++ b/arch/tile/mm/hugetlbpage.c
@@ -77,7 +77,7 @@
else {
if (sz != PAGE_SIZE << huge_shift[HUGE_SHIFT_PAGE])
panic("Unexpected page size %#lx\n", sz);
- return pte_alloc_map(mm, NULL, pmd, addr);
+ return pte_alloc_map(mm, pmd, addr);
}
}
#else
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 9591a66..3943e9d 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -31,7 +31,7 @@
if (!pmd)
goto out_pmd;
- pte = pte_alloc_map(mm, NULL, pmd, proc);
+ pte = pte_alloc_map(mm, pmd, proc);
if (!pte)
goto out_pte;
diff --git a/arch/unicore32/mm/pgd.c b/arch/unicore32/mm/pgd.c
index 2ade20d..c572a28 100644
--- a/arch/unicore32/mm/pgd.c
+++ b/arch/unicore32/mm/pgd.c
@@ -54,7 +54,7 @@
if (!new_pmd)
goto no_pmd;
- new_pte = pte_alloc_map(mm, NULL, new_pmd, 0);
+ new_pte = pte_alloc_map(mm, new_pmd, 0);
if (!new_pte)
goto no_pte;
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index 91a4496..e72a07f 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -135,7 +135,7 @@
pmd = pmd_alloc(&tboot_mm, pud, vaddr);
if (!pmd)
return -1;
- pte = pte_alloc_map(&tboot_mm, NULL, pmd, vaddr);
+ pte = pte_alloc_map(&tboot_mm, pmd, vaddr);
if (!pte)
return -1;
set_pte_at(&tboot_mm, vaddr, pte, pfn_pte(pfn, prot));