diff mbox series

[7/9] mm: Drop hugetlb_get_unmapped_area{_*} functions

Message ID 20240718105903.19617-8-osalvador@suse.de (mailing list archive)
State New
Headers show
Series Unify hugetlb into arch_get_unmapped_area functions | expand

Commit Message

Oscar Salvador July 18, 2024, 10:59 a.m. UTC 
Hugetlb mappings are now handled through normal channels just like any
other mapping, so we no longer need hugetlb_get_unmapped_area* specific
functions.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
---
 arch/parisc/mm/hugetlbpage.c     |  23 -------
 arch/powerpc/mm/book3s64/slice.c |  10 ---
 arch/s390/mm/hugetlbpage.c       |  84 ------------------------
 arch/sparc/mm/hugetlbpage.c      | 108 -------------------------------
 arch/x86/mm/hugetlbpage.c        | 100 ----------------------------
 fs/hugetlbfs/inode.c             |  86 ------------------------
 include/linux/hugetlb.h          |   5 --
 7 files changed, 416 deletions(-)

Comments

Andrew Morton July 24, 2024, 12:37 a.m. UTC | #1 
On Thu, 18 Jul 2024 12:59:01 +0200 Oscar Salvador <osalvador@suse.de> wrote:

> Hugetlb mappings are now handled through normal channels just like any
> other mapping, so we no longer need hugetlb_get_unmapped_area* specific
> functions.
> 
> ...
>
>  fs/hugetlbfs/inode.c             |  86 ------------------------

The fs/hugetlbfs/inode.c code which this patch removes is quite
different from the code which is currently present.

The concern is that important recent changes to this code were not
carried over into the code which replaced it ("normal channels").  And
that this patchset hasn't been tested against latest trees.

So can we please have a redo?

(Here's my diff of what-is-there versus what-this-patch-removes)

--- /tmp/1	2024-07-23 17:29:43.704770012 -0700
+++ /tmp/2	2024-07-23 17:29:42.232748301 -0700
@@ -1,29 +1,28 @@
-static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
-		unsigned long addr, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
+static unsigned long
+hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr,
+		unsigned long len, unsigned long pgoff, unsigned long flags)
 {
 	struct hstate *h = hstate_file(file);
 	struct vm_unmapped_area_info info = {};
 
 	info.length = len;
 	info.low_limit = current->mm->mmap_base;
-	info.high_limit = TASK_SIZE;
+	info.high_limit = arch_get_mmap_end(addr, len, flags);
 	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
 	return vm_unmapped_area(&info);
 }
 
-static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
-		unsigned long addr0, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
+static unsigned long
+hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr,
+		unsigned long len, unsigned long pgoff, unsigned long flags)
 {
 	struct hstate *h = hstate_file(file);
 	struct vm_unmapped_area_info info = {};
-	unsigned long addr;
 
 	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
 	info.length = len;
 	info.low_limit = PAGE_SIZE;
-	info.high_limit = current->mm->mmap_base;
+	info.high_limit = arch_get_mmap_base(addr, current->mm->mmap_base);
 	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
 	addr = vm_unmapped_area(&info);
 
@@ -33,53 +32,56 @@
 	 * can happen with large stack limits and large mmap()
 	 * allocations.
 	 */
-	if (addr & ~PAGE_MASK) {
+	if (unlikely(offset_in_page(addr))) {
 		VM_BUG_ON(addr != -ENOMEM);
 		info.flags = 0;
-		info.low_limit = TASK_UNMAPPED_BASE;
-		info.high_limit = TASK_SIZE;
+		info.low_limit = current->mm->mmap_base;
+		info.high_limit = arch_get_mmap_end(addr, len, flags);
 		addr = vm_unmapped_area(&info);
 	}
 
 	return addr;
 }
 
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
+unsigned long
+generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
+				  unsigned long len, unsigned long pgoff,
+				  unsigned long flags)
 {
-	struct hstate *h = hstate_file(file);
 	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
+	struct vm_area_struct *vma, *prev;
+	struct hstate *h = hstate_file(file);
+	const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags);
 
 	if (len & ~huge_page_mask(h))
 		return -EINVAL;
-	if (len > TASK_SIZE - mmap_min_addr)
+	if (len > mmap_end - mmap_min_addr)
 		return -ENOMEM;
 
 	if (flags & MAP_FIXED) {
 		if (prepare_hugepage_range(file, addr, len))
 			return -EINVAL;
-		goto check_asce_limit;
+		return addr;
 	}
 
 	if (addr) {
 		addr = ALIGN(addr, huge_page_size(h));
-		vma = find_vma(mm, addr);
-		if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
-		    (!vma || addr + len <= vm_start_gap(vma)))
-			goto check_asce_limit;
+		vma = find_vma_prev(mm, addr, &prev);
+		if (mmap_end - len >= addr && addr >= mmap_min_addr &&
+		    (!vma || addr + len <= vm_start_gap(vma)) &&
+		    (!prev || addr >= vm_end_gap(prev)))
+			return addr;
 	}
 
-	if (!test_bit(MMF_TOPDOWN, &mm->flags))
-		addr = hugetlb_get_unmapped_area_bottomup(file, addr, len,
-				pgoff, flags);
-	else
-		addr = hugetlb_get_unmapped_area_topdown(file, addr, len,
+	/*
+	 * Use MMF_TOPDOWN flag as a hint to use topdown routine.
+	 * If architectures have special needs, they should define their own
+	 * version of hugetlb_get_unmapped_area.
+	 */
+	if (test_bit(MMF_TOPDOWN, &mm->flags))
+		return hugetlb_get_unmapped_area_topdown(file, addr, len,
 				pgoff, flags);
-	if (offset_in_page(addr))
-		return addr;
-
-check_asce_limit:
-	return check_asce_limit(mm, addr, len);
+	return hugetlb_get_unmapped_area_bottomup(file, addr, len,
+			pgoff, flags);
 }
diff mbox series

Patch

diff --git a/arch/parisc/mm/hugetlbpage.c b/arch/parisc/mm/hugetlbpage.c
index 0356199bd9e7..69c463d6ffd6 100644
--- a/arch/parisc/mm/hugetlbpage.c
+++ b/arch/parisc/mm/hugetlbpage.c
@@ -21,29 +21,6 @@ 
 #include <asm/mmu_context.h>
 
 
-unsigned long
-hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (len > TASK_SIZE)
-		return -ENOMEM;
-
-	if (flags & MAP_FIXED)
-		if (prepare_hugepage_range(file, addr, len))
-			return -EINVAL;
-
-	if (addr)
-		addr = ALIGN(addr, huge_page_size(h));
-
-	/* we need to make sure the colouring is OK */
-	return arch_get_unmapped_area(file, addr, len, pgoff, flags);
-}
-
-
 pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
 			unsigned long addr, unsigned long sz)
 {
diff --git a/arch/powerpc/mm/book3s64/slice.c b/arch/powerpc/mm/book3s64/slice.c
index 6914b8de627c..6ce16bc330a2 100644
--- a/arch/powerpc/mm/book3s64/slice.c
+++ b/arch/powerpc/mm/book3s64/slice.c
@@ -811,14 +811,4 @@  unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
 
 	return 1UL << mmu_psize_to_shift(get_slice_psize(vma->vm_mm, vma->vm_start));
 }
-
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-					unsigned long len, unsigned long pgoff,
-					unsigned long flags)
-{
-	if (radix_enabled())
-		return generic_hugetlb_get_unmapped_area(file, addr, len, pgoff, flags);
-
-	return slice_get_unmapped_area(addr, len, flags, file_to_psize(file), 1);
-}
 #endif
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index 2675aab4acc7..e8d91428f3d1 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -243,87 +243,3 @@  bool __init arch_hugetlb_valid_size(unsigned long size)
 		return false;
 }
 
-static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
-		unsigned long addr, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-
-	info.length = len;
-	info.low_limit = current->mm->mmap_base;
-	info.high_limit = TASK_SIZE;
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	return vm_unmapped_area(&info);
-}
-
-static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
-		unsigned long addr0, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-	unsigned long addr;
-
-	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
-	info.length = len;
-	info.low_limit = PAGE_SIZE;
-	info.high_limit = current->mm->mmap_base;
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	addr = vm_unmapped_area(&info);
-
-	/*
-	 * A failed mmap() very likely causes application failure,
-	 * so fall back to the bottom-up function here. This scenario
-	 * can happen with large stack limits and large mmap()
-	 * allocations.
-	 */
-	if (addr & ~PAGE_MASK) {
-		VM_BUG_ON(addr != -ENOMEM);
-		info.flags = 0;
-		info.low_limit = TASK_UNMAPPED_BASE;
-		info.high_limit = TASK_SIZE;
-		addr = vm_unmapped_area(&info);
-	}
-
-	return addr;
-}
-
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
-
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (len > TASK_SIZE - mmap_min_addr)
-		return -ENOMEM;
-
-	if (flags & MAP_FIXED) {
-		if (prepare_hugepage_range(file, addr, len))
-			return -EINVAL;
-		goto check_asce_limit;
-	}
-
-	if (addr) {
-		addr = ALIGN(addr, huge_page_size(h));
-		vma = find_vma(mm, addr);
-		if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
-		    (!vma || addr + len <= vm_start_gap(vma)))
-			goto check_asce_limit;
-	}
-
-	if (!test_bit(MMF_TOPDOWN, &mm->flags))
-		addr = hugetlb_get_unmapped_area_bottomup(file, addr, len,
-				pgoff, flags);
-	else
-		addr = hugetlb_get_unmapped_area_topdown(file, addr, len,
-				pgoff, flags);
-	if (offset_in_page(addr))
-		return addr;
-
-check_asce_limit:
-	return check_asce_limit(mm, addr, len);
-}
diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
index cc91ca7a1e18..eee601a0d2cf 100644
--- a/arch/sparc/mm/hugetlbpage.c
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -19,114 +19,6 @@ 
 #include <asm/cacheflush.h>
 #include <asm/mmu_context.h>
 
-/* Slightly simplified from the non-hugepage variant because by
- * definition we don't have to worry about any page coloring stuff
- */
-
-static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *filp,
-							unsigned long addr,
-							unsigned long len,
-							unsigned long pgoff,
-							unsigned long flags)
-{
-	struct hstate *h = hstate_file(filp);
-	unsigned long task_size = TASK_SIZE;
-	struct vm_unmapped_area_info info = {};
-
-	if (test_thread_flag(TIF_32BIT))
-		task_size = STACK_TOP32;
-
-	info.length = len;
-	info.low_limit = TASK_UNMAPPED_BASE;
-	info.high_limit = min(task_size, VA_EXCLUDE_START);
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	addr = vm_unmapped_area(&info);
-
-	if ((addr & ~PAGE_MASK) && task_size > VA_EXCLUDE_END) {
-		VM_BUG_ON(addr != -ENOMEM);
-		info.low_limit = VA_EXCLUDE_END;
-		info.high_limit = task_size;
-		addr = vm_unmapped_area(&info);
-	}
-
-	return addr;
-}
-
-static unsigned long
-hugetlb_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
-				  const unsigned long len,
-				  const unsigned long pgoff,
-				  const unsigned long flags)
-{
-	struct hstate *h = hstate_file(filp);
-	struct mm_struct *mm = current->mm;
-	unsigned long addr = addr0;
-	struct vm_unmapped_area_info info = {};
-
-	/* This should only ever run for 32-bit processes.  */
-	BUG_ON(!test_thread_flag(TIF_32BIT));
-
-	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
-	info.length = len;
-	info.low_limit = PAGE_SIZE;
-	info.high_limit = mm->mmap_base;
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	addr = vm_unmapped_area(&info);
-
-	/*
-	 * A failed mmap() very likely causes application failure,
-	 * so fall back to the bottom-up function here. This scenario
-	 * can happen with large stack limits and large mmap()
-	 * allocations.
-	 */
-	if (addr & ~PAGE_MASK) {
-		VM_BUG_ON(addr != -ENOMEM);
-		info.flags = 0;
-		info.low_limit = TASK_UNMAPPED_BASE;
-		info.high_limit = STACK_TOP32;
-		addr = vm_unmapped_area(&info);
-	}
-
-	return addr;
-}
-
-unsigned long
-hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
-	unsigned long task_size = TASK_SIZE;
-
-	if (test_thread_flag(TIF_32BIT))
-		task_size = STACK_TOP32;
-
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (len > task_size)
-		return -ENOMEM;
-
-	if (flags & MAP_FIXED) {
-		if (prepare_hugepage_range(file, addr, len))
-			return -EINVAL;
-		return addr;
-	}
-
-	if (addr) {
-		addr = ALIGN(addr, huge_page_size(h));
-		vma = find_vma(mm, addr);
-		if (task_size - len >= addr &&
-		    (!vma || addr + len <= vm_start_gap(vma)))
-			return addr;
-	}
-	if (!test_bit(MMF_TOPDOWN, &mm->flags))
-		return hugetlb_get_unmapped_area_bottomup(file, addr, len,
-				pgoff, flags);
-	else
-		return hugetlb_get_unmapped_area_topdown(file, addr, len,
-				pgoff, flags);
-}
 
 static pte_t sun4u_hugepage_shift_to_tte(pte_t entry, unsigned int shift)
 {
diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c
index 807a5859a3c4..e0c03fe3a994 100644
--- a/arch/x86/mm/hugetlbpage.c
+++ b/arch/x86/mm/hugetlbpage.c
@@ -19,107 +19,7 @@ 
 #include <asm/tlbflush.h>
 #include <asm/elf.h>
 
-#ifdef CONFIG_HUGETLB_PAGE
-static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
-		unsigned long addr, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-
-	info.length = len;
-	info.low_limit = get_mmap_base(1);
-
-	/*
-	 * If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area
-	 * in the full address space.
-	 */
-	info.high_limit = in_32bit_syscall() ?
-		task_size_32bit() : task_size_64bit(addr > DEFAULT_MAP_WINDOW);
-
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	return vm_unmapped_area(&info);
-}
-
-static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
-		unsigned long addr, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-
-	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
-	info.length = len;
-	info.low_limit = PAGE_SIZE;
-	info.high_limit = get_mmap_base(0);
-
-	/*
-	 * If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area
-	 * in the full address space.
-	 */
-	if (addr > DEFAULT_MAP_WINDOW && !in_32bit_syscall())
-		info.high_limit += TASK_SIZE_MAX - DEFAULT_MAP_WINDOW;
-
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	addr = vm_unmapped_area(&info);
-
-	/*
-	 * A failed mmap() very likely causes application failure,
-	 * so fall back to the bottom-up function here. This scenario
-	 * can happen with large stack limits and large mmap()
-	 * allocations.
-	 */
-	if (addr & ~PAGE_MASK) {
-		VM_BUG_ON(addr != -ENOMEM);
-		info.flags = 0;
-		info.low_limit = TASK_UNMAPPED_BASE;
-		info.high_limit = TASK_SIZE_LOW;
-		addr = vm_unmapped_area(&info);
-	}
 
-	return addr;
-}
-
-unsigned long
-hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
-
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-
-	if (len > TASK_SIZE)
-		return -ENOMEM;
-
-	/* No address checking. See comment at mmap_address_hint_valid() */
-	if (flags & MAP_FIXED) {
-		if (prepare_hugepage_range(file, addr, len))
-			return -EINVAL;
-		return addr;
-	}
-
-	if (addr) {
-		addr &= huge_page_mask(h);
-		if (!mmap_address_hint_valid(addr, len))
-			goto get_unmapped_area;
-
-		vma = find_vma(mm, addr);
-		if (!vma || addr + len <= vm_start_gap(vma))
-			return addr;
-	}
-
-get_unmapped_area:
-	if (!test_bit(MMF_TOPDOWN, &mm->flags))
-		return hugetlb_get_unmapped_area_bottomup(file, addr, len,
-				pgoff, flags);
-	else
-		return hugetlb_get_unmapped_area_topdown(file, addr, len,
-				pgoff, flags);
-}
-#endif /* CONFIG_HUGETLB_PAGE */
 
 #ifdef CONFIG_X86_64
 bool __init arch_hugetlb_valid_size(unsigned long size)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index d02b4bc6c5e9..4902220adf42 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -171,92 +171,6 @@  static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
  * Called under mmap_write_lock(mm).
  */
 
-static unsigned long
-hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-
-	info.length = len;
-	info.low_limit = current->mm->mmap_base;
-	info.high_limit = arch_get_mmap_end(addr, len, flags);
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	return vm_unmapped_area(&info);
-}
-
-static unsigned long
-hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-
-	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
-	info.length = len;
-	info.low_limit = PAGE_SIZE;
-	info.high_limit = arch_get_mmap_base(addr, current->mm->mmap_base);
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	addr = vm_unmapped_area(&info);
-
-	/*
-	 * A failed mmap() very likely causes application failure,
-	 * so fall back to the bottom-up function here. This scenario
-	 * can happen with large stack limits and large mmap()
-	 * allocations.
-	 */
-	if (unlikely(offset_in_page(addr))) {
-		VM_BUG_ON(addr != -ENOMEM);
-		info.flags = 0;
-		info.low_limit = current->mm->mmap_base;
-		info.high_limit = arch_get_mmap_end(addr, len, flags);
-		addr = vm_unmapped_area(&info);
-	}
-
-	return addr;
-}
-
-unsigned long
-generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-				  unsigned long len, unsigned long pgoff,
-				  unsigned long flags)
-{
-	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, len, flags);
-
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (len > TASK_SIZE)
-		return -ENOMEM;
-
-	if (flags & MAP_FIXED) {
-		if (prepare_hugepage_range(file, addr, len))
-			return -EINVAL;
-		return addr;
-	}
-
-	if (addr) {
-		addr = ALIGN(addr, huge_page_size(h));
-		vma = find_vma(mm, addr);
-		if (mmap_end - len >= addr &&
-		    (!vma || addr + len <= vm_start_gap(vma)))
-			return addr;
-	}
-
-	/*
-	 * Use MMF_TOPDOWN flag as a hint to use topdown routine.
-	 * If architectures have special needs, they should define their own
-	 * version of hugetlb_get_unmapped_area.
-	 */
-	if (test_bit(MMF_TOPDOWN, &mm->flags))
-		return hugetlb_get_unmapped_area_topdown(file, addr, len,
-				pgoff, flags);
-	return hugetlb_get_unmapped_area_bottomup(file, addr, len,
-			pgoff, flags);
-}
-
 unsigned long
 hugetlb_mmap_check_and_align(struct file *file, unsigned long addr,
 			     unsigned long len, unsigned long flags)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 9183ef95dfb6..a83a2b331bab 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -559,11 +559,6 @@  unsigned long
 hugetlb_mmap_check_and_align(struct file *file, unsigned long addr,
 			     unsigned long len, unsigned long flags);
 
-unsigned long
-generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-				  unsigned long len, unsigned long pgoff,
-				  unsigned long flags);
-
 /*
  * huegtlb page specific state flags.  These flags are located in page.private
  * of the hugetlb head page.  Functions created via the below macros should be