[PATCH v10 04/13] mm: Add len and flags parameters to arch_get_mmap_end()

Christophe Leroy
2022-04-09T17:18:52Z

Powerpc needs flags and len to make decision on arch_get_mmap_end().

So add them as parameters to arch_get_mmap_end().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Steve Capper <steve.capper@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm64/include/asm/processor.h | 4 ++--
fs/hugetlbfs/inode.c | 6 +++---
include/linux/sched/mm.h | 2 +-
mm/mmap.c | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 73e38d9a540c..bd22d94e844d 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -92,8 +92,8 @@
#endif /* CONFIG_COMPAT */

#ifndef CONFIG_ARM64_FORCE_52BIT
-#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\
- DEFAULT_MAP_WINDOW)
+#define arch_get_mmap_end(addr, len, flags) \
+ (((addr) > DEFAULT_MAP_WINDOW) ? TASK_SIZE : DEFAULT_MAP_WINDOW)

#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \
base + TASK_SIZE - DEFAULT_MAP_WINDOW :\
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index ec611c7de9e3..6f863497bd69 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -205,7 +205,7 @@ hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr,
info.flags = 0;
info.length = len;
info.low_limit = current->mm->mmap_base;
- info.high_limit = arch_get_mmap_end(addr);
+ info.high_limit = arch_get_mmap_end(addr, len, flags);
info.align_mask = PAGE_MASK & ~huge_page_mask(h);
info.align_offset = 0;
return vm_unmapped_area(&info);
@@ -236,7 +236,7 @@ hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr,
VM_BUG_ON(addr != -ENOMEM);
info.flags = 0;
info.low_limit = current->mm->mmap_base;
- info.high_limit = arch_get_mmap_end(addr);
+ info.high_limit = arch_get_mmap_end(addr, len, flags);
addr = vm_unmapped_area(&info);
}

@@ -251,7 +251,7 @@ generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
struct hstate *h = hstate_file(file);
- const unsigned long mmap_end = arch_get_mmap_end(addr);
+ const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags);

if (len & ~huge_page_mask(h))
return -EINVAL;
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index da3a32d05b34..8cd975a8bfeb 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -137,7 +137,7 @@ static inline void mm_update_next_owner(struct mm_struct *mm)

#ifdef CONFIG_MMU
#ifndef arch_get_mmap_end
-#define arch_get_mmap_end(addr) (TASK_SIZE)
+#define arch_get_mmap_end(addr, len, flags) (TASK_SIZE)
#endif

#ifndef arch_get_mmap_base
diff --git a/mm/mmap.c b/mm/mmap.c
index d2b6c3fbfb8c..e9b7d74e58bc 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2136,7 +2136,7 @@ generic_get_unmapped_area(struct file *filp, unsigned long addr,
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma, *prev;
struct vm_unmapped_area_info info;
- const unsigned long mmap_end = arch_get_mmap_end(addr);
+ const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags);

if (len > mmap_end - mmap_min_addr)
return -ENOMEM;
@@ -2184,7 +2184,7 @@ generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
struct vm_area_struct *vma, *prev;
struct mm_struct *mm = current->mm;
struct vm_unmapped_area_info info;
- const unsigned long mmap_end = arch_get_mmap_end(addr);
+ const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags);

/* requested length too big for entire address space */
if (len > mmap_end - mmap_min_addr)
--
2.35.1