The patch titled
Subject: mm: powerpc: introduce arch_mmap_hint()
has been added to the -mm mm-unstable branch. Its filename is
mm-powerpc-introduce-arch_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-powerpc-introduce-arch_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: powerpc: introduce arch_mmap_hint()
Date: Wed, 11 Dec 2024 15:27:53 -0800
Introduce powerpc 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/20241211232754.1583023-16-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/powerpc/include/asm/book3s/64/slice.h | 1
arch/powerpc/mm/book3s64/slice.c | 31 +++++++++++++++++++
2 files changed, 32 insertions(+)
--- a/arch/powerpc/include/asm/book3s/64/slice.h~mm-powerpc-introduce-arch_mmap_hint
+++ a/arch/powerpc/include/asm/book3s/64/slice.h
@@ -10,6 +10,7 @@
#endif
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+#define HAVE_ARCH_MMAP_HINT
#endif
#define SLICE_LOW_SHIFT 28
--- a/arch/powerpc/mm/book3s64/slice.c~mm-powerpc-introduce-arch_mmap_hint
+++ a/arch/powerpc/mm/book3s64/slice.c
@@ -647,6 +647,37 @@ static int file_to_psize(struct file *fi
}
#endif
+static unsigned long slice_mmap_hint(unsigned long addr, unsigned long len,
+ unsigned long flags, unsigned int psize)
+{
+ unsigned long hint_addr = slice_get_unmapped_area(addr, len, flags, psize, 0);
+
+ if (IS_ERR_VALUE(hint_addr) || hint_addr == PAGE_ALIGN(addr))
+ return hint_addr;
+
+ return 0;
+}
+
+unsigned long arch_mmap_hint(struct file *filp, unsigned long addr,
+ unsigned long len, unsigned long pgoff,
+ unsigned long flags)
+{
+ unsigned int psize;
+
+ if (!addr)
+ return 0;
+
+ if (radix_enabled())
+ return generic_mmap_hint(filp, addr, len, pgoff, flags);
+
+ if (filp && is_file_hugepages(filp))
+ psize = file_to_psize(filp);
+ else
+ psize = mm_ctx_user_psize(¤t->mm->context);
+
+ return slice_mmap_hint(addr, len, flags, psize);
+}
+
unsigned long arch_get_unmapped_area(struct file *filp,
unsigned long addr,
unsigned long len,
_
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
