From: Oscar Salvador <osalvador@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Peter Xu <peterx@redhat.com>, Muchun Song <muchun.song@linux.dev>,
David Hildenbrand <david@redhat.com>,
Donet Tom <donettom@linux.ibm.com>,
Vlastimil Babka <vbabka@suse.cz>, Michal Hocko <mhocko@suse.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
Oscar Salvador <osalvador@suse.de>
Subject: [PATCH v3 9/9] mm: Consolidate common checks in hugetlb_get_unmapped_area
Date: Tue, 10 Sep 2024 10:00:30 +0200 [thread overview]
Message-ID: <20240910080030.1272373-10-osalvador@suse.de> (raw)
In-Reply-To: <20240910080030.1272373-1-osalvador@suse.de>
prepare_hugepage_range() performs almost the same checks for all
architectures that define it, with the exception of mips and loongarch
that also check for overflows.
The rest checks for the addr and len to be properly aligned, so we can
move that to hugetlb_get_unmapped_area() and get rid of a fair amount of
duplicated code.
Signed-off-by: Oscar Salvador <osalvador@suse.de>
---
arch/loongarch/include/asm/hugetlb.h | 4 ----
arch/mips/include/asm/hugetlb.h | 4 ----
arch/parisc/include/asm/hugetlb.h | 15 ---------------
arch/s390/include/asm/hugetlb.h | 17 -----------------
arch/sh/include/asm/hugetlb.h | 15 ---------------
fs/hugetlbfs/inode.c | 8 ++++++--
include/asm-generic/hugetlb.h | 7 -------
7 files changed, 6 insertions(+), 64 deletions(-)
diff --git a/arch/loongarch/include/asm/hugetlb.h b/arch/loongarch/include/asm/hugetlb.h
index 5da32c00d483..bf41b024b6a4 100644
--- a/arch/loongarch/include/asm/hugetlb.h
+++ b/arch/loongarch/include/asm/hugetlb.h
@@ -18,10 +18,6 @@ static inline int prepare_hugepage_range(struct file *file,
unsigned long task_size = STACK_TOP;
struct hstate *h = hstate_file(file);
- if (len & ~huge_page_mask(h))
- return -EINVAL;
- if (addr & ~huge_page_mask(h))
- return -EINVAL;
if (len > task_size)
return -ENOMEM;
if (task_size - len < addr)
diff --git a/arch/mips/include/asm/hugetlb.h b/arch/mips/include/asm/hugetlb.h
index fd69c8808554..6a63d82a8ab3 100644
--- a/arch/mips/include/asm/hugetlb.h
+++ b/arch/mips/include/asm/hugetlb.h
@@ -19,10 +19,6 @@ static inline int prepare_hugepage_range(struct file *file,
unsigned long task_size = STACK_TOP;
struct hstate *h = hstate_file(file);
- if (len & ~huge_page_mask(h))
- return -EINVAL;
- if (addr & ~huge_page_mask(h))
- return -EINVAL;
if (len > task_size)
return -ENOMEM;
if (task_size - len < addr)
diff --git a/arch/parisc/include/asm/hugetlb.h b/arch/parisc/include/asm/hugetlb.h
index 72daacc472a0..5b3a5429f71b 100644
--- a/arch/parisc/include/asm/hugetlb.h
+++ b/arch/parisc/include/asm/hugetlb.h
@@ -12,21 +12,6 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep);
-/*
- * If the arch doesn't supply something else, assume that hugepage
- * size aligned regions are ok without further preparation.
- */
-#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
-static inline int prepare_hugepage_range(struct file *file,
- unsigned long addr, unsigned long len)
-{
- if (len & ~HPAGE_MASK)
- return -EINVAL;
- if (addr & ~HPAGE_MASK)
- return -EINVAL;
- return 0;
-}
-
#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h
index 37e80a32623a..6f815d4ba0ca 100644
--- a/arch/s390/include/asm/hugetlb.h
+++ b/arch/s390/include/asm/hugetlb.h
@@ -25,23 +25,6 @@ extern pte_t huge_ptep_get(struct mm_struct *mm, unsigned long addr, pte_t *ptep
extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
unsigned long addr, pte_t *ptep);
-/*
- * If the arch doesn't supply something else, assume that hugepage
- * size aligned regions are ok without further preparation.
- */
-#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
-static inline int prepare_hugepage_range(struct file *file,
- unsigned long addr, unsigned long len)
-{
- struct hstate *h = hstate_file(file);
-
- if (len & ~huge_page_mask(h))
- return -EINVAL;
- if (addr & ~huge_page_mask(h))
- return -EINVAL;
- return 0;
-}
-
static inline void arch_clear_hugetlb_flags(struct folio *folio)
{
clear_bit(PG_arch_1, &folio->flags);
diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h
index 75028bd568ba..4a92e6e4d627 100644
--- a/arch/sh/include/asm/hugetlb.h
+++ b/arch/sh/include/asm/hugetlb.h
@@ -5,21 +5,6 @@
#include <asm/cacheflush.h>
#include <asm/page.h>
-/*
- * If the arch doesn't supply something else, assume that hugepage
- * size aligned regions are ok without further preparation.
- */
-#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
-static inline int prepare_hugepage_range(struct file *file,
- unsigned long addr, unsigned long len)
-{
- if (len & ~HPAGE_MASK)
- return -EINVAL;
- if (addr & ~HPAGE_MASK)
- return -EINVAL;
- return 0;
-}
-
#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index b6a619f5a85a..cd49d21e7284 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -181,8 +181,12 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
if (len & ~huge_page_mask(h))
return -EINVAL;
- if ((flags & MAP_FIXED) && prepare_hugepage_range(file, addr, len))
- return -EINVAL;
+ if (flags & MAP_FIXED) {
+ if (addr & ~huge_page_mask(h))
+ return -EINVAL;
+ if (prepare_hugepage_range(file, addr, len))
+ return -EINVAL;
+ }
if (addr)
addr0 = ALIGN(addr, huge_page_size(h));
diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
index 67bbdafcfc22..f42133dae68e 100644
--- a/include/asm-generic/hugetlb.h
+++ b/include/asm-generic/hugetlb.h
@@ -123,13 +123,6 @@ static inline int huge_pte_none_mostly(pte_t pte)
static inline int prepare_hugepage_range(struct file *file,
unsigned long addr, unsigned long len)
{
- struct hstate *h = hstate_file(file);
-
- if (len & ~huge_page_mask(h))
- return -EINVAL;
- if (addr & ~huge_page_mask(h))
- return -EINVAL;
-
return 0;
}
#endif
--
2.46.0
next prev parent reply other threads:[~2024-09-10 8:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-10 8:00 [PATCH v3 0/9] Unify hugetlb into arch_get_unmapped_area functions Oscar Salvador
2024-09-10 8:00 ` [PATCH v3 1/9] mm/mmap: Teach generic_get_unmapped_area{_topdown} to handle hugetlb mappings Oscar Salvador
2024-09-10 8:00 ` [PATCH v3 2/9] arch/s390: Teach arch_get_unmapped_area{_topdown} " Oscar Salvador
2024-09-10 8:00 ` [PATCH v3 3/9] arch/x86: Teach arch_get_unmapped_area_vmflags " Oscar Salvador
2024-09-10 8:00 ` [PATCH v3 4/9] arch/sparc: Teach arch_get_unmapped_area{_topdown} " Oscar Salvador
2024-09-13 11:16 ` kernel test robot
2024-09-10 8:00 ` [PATCH v3 5/9] arch/powerpc: Teach book3s64 " Oscar Salvador
2024-09-10 8:00 ` [PATCH v3 6/9] mm: Make hugetlb mappings go through mm_get_unmapped_area_vmflags Oscar Salvador
2024-09-10 8:00 ` [PATCH v3 7/9] mm: Drop hugetlb_get_unmapped_area{_*} functions Oscar Salvador
2024-09-10 8:00 ` [PATCH v3 8/9] arch/s390: Clean up hugetlb definitions Oscar Salvador
2024-09-10 8:00 ` Oscar Salvador [this message]
2024-09-13 8:51 ` [PATCH v3 9/9] mm: Consolidate common checks in hugetlb_get_unmapped_area kernel test robot
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