The patch titled
Subject: mm: parisc: introduce arch_align_mmap_hint()
has been added to the -mm mm-unstable branch. Its filename is
mm-parisc-introduce-arch_align_mmap_hint.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-parisc-introduce-arch_align_mmap_hint.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Subject: mm: parisc: introduce arch_align_mmap_hint()
Date: Wed, 11 Dec 2024 15:27:47 -0800
Introduce parisc arch_mmap_hint() and define HAVE_ARCH_MMAP_HINT. This is
a preparatory patch, no functional change is introduced.
Link: https://lkml.kernel.org/r/20241211232754.1583023-10-kaleshsingh@xxxxxxxxxx
Signed-off-by: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: Breno Leitao <leitao@xxxxxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Jason Andryuk <jason.andryuk@xxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yang Shi <yang@xxxxxxxxxxxxxxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/parisc/include/asm/pgtable.h | 1
arch/parisc/kernel/sys_parisc.c | 55 +++++++++++++++-------------
2 files changed, 32 insertions(+), 24 deletions(-)
--- a/arch/parisc/include/asm/pgtable.h~mm-parisc-introduce-arch_align_mmap_hint
+++ a/arch/parisc/include/asm/pgtable.h
@@ -505,6 +505,7 @@ static inline void ptep_set_wrprotect(st
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+#define HAVE_ARCH_MMAP_HINT
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
--- a/arch/parisc/kernel/sys_parisc.c~mm-parisc-introduce-arch_align_mmap_hint
+++ a/arch/parisc/kernel/sys_parisc.c
@@ -96,24 +96,16 @@ unsigned long mmap_upper_limit(struct rl
enum mmap_allocation_direction {UP, DOWN};
-static unsigned long arch_get_unmapped_area_common(struct file *filp,
- unsigned long addr, unsigned long len, unsigned long pgoff,
- unsigned long flags, enum mmap_allocation_direction dir)
+unsigned long arch_mmap_hint(struct file *filp, unsigned long addr,
+ unsigned long len, unsigned long pgoff,
+ unsigned long flags)
{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma, *prev;
unsigned long filp_pgoff;
- int do_color_align;
- struct vm_unmapped_area_info info = {
- .length = len
- };
+ bool do_color_align;
if (unlikely(len > TASK_SIZE))
return -ENOMEM;
- do_color_align = 0;
- if (filp || (flags & MAP_SHARED))
- do_color_align = 1;
filp_pgoff = GET_FILP_PGOFF(filp);
if (flags & MAP_FIXED) {
@@ -128,18 +120,33 @@ static unsigned long arch_get_unmapped_a
return addr;
}
- if (addr) {
- if (do_color_align)
- addr = COLOR_ALIGN(addr, filp_pgoff, pgoff);
- else
- addr = PAGE_ALIGN(addr);
-
- vma = find_vma_prev(mm, addr, &prev);
- if (TASK_SIZE - len >= addr &&
- (!vma || addr + len <= vm_start_gap(vma)) &&
- (!prev || addr >= vm_end_gap(prev)))
- return addr;
- }
+ do_color_align = filp || (flags & MAP_SHARED);
+
+ if (do_color_align)
+ addr = COLOR_ALIGN(addr, filp_pgoff, pgoff);
+ else
+ addr = PAGE_ALIGN(addr);
+
+ return generic_mmap_hint(filp, addr, len, pgoff, flags);
+}
+
+static unsigned long arch_get_unmapped_area_common(struct file *filp,
+ unsigned long addr, unsigned long len, unsigned long pgoff,
+ unsigned long flags, enum mmap_allocation_direction dir)
+{
+ struct mm_struct *mm = current->mm;
+ unsigned long filp_pgoff;
+ bool do_color_align;
+ struct vm_unmapped_area_info info = {
+ .length = len
+ };
+
+ addr = arch_mmap_hint(filp, addr, len, pgoff, flags);
+ if (addr)
+ return addr;
+
+ filp_pgoff = GET_FILP_PGOFF(filp);
+ do_color_align = filp || (flags & MAP_SHARED);
info.align_mask = do_color_align ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
info.align_offset = shared_align_offset(filp_pgoff, pgoff);
_
Patches currently in -mm which might be from kaleshsingh@xxxxxxxxxx are
mm-introduce-generic_mmap_hint.patch
mm-x86-introduce-arch_mmap_hint.patch
mm-arm-introduce-arch_mmap_hint.patch
mm-alpha-introduce-arch_mmap_hint.patch
mm-arc-use-generic_mmap_hint.patch
mm-csky-introduce-arch_mmap_hint.patch
mm-loongarch-introduce-arch_mmap_hint.patch
mm-mips-introduce-arch_align_mmap_hint.patch
mm-parisc-introduce-arch_align_mmap_hint.patch
mm-s390-use-generic_mmap_hint.patch
mm-sh-introduce-arch_mmap_hint.patch
mm-sparc32-introduce-arch_mmap_hint.patch
mm-sparc64-introduce-arch_mmap_hint.patch
mm-xtensa-introduce-arch_mmap_hint.patch
mm-powerpc-introduce-arch_mmap_hint.patch
mm-respect-mmap-hint-before-thp-alignment-if-allocation-is-possible.patch
