The patch titled
Subject: arm64/mm: implement unmap_hotplug_p4d_range
has been added to the -mm tree. Its filename is
arm-arm64-add-support-for-folded-p4d-page-tables-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arm-arm64-add-support-for-folded-p4d-page-tables-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arm-arm64-add-support-for-folded-p4d-page-tables-fix.patch
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------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: arm64/mm: implement unmap_hotplug_p4d_range
Link: http://lkml.kernel.org/r/20200302135443.GA24831@xxxxxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Anders Roxell <anders.roxell@xxxxxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Brian Cain <bcain@xxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Guan Xuetao <gxt@xxxxxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: Jonas Bonn <jonas@xxxxxxxxxxxx>
Cc: Julien Thierry <julien.thierry.kdev@xxxxxxxxx>
Cc: Ley Foon Tan <ley.foon.tan@xxxxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Stafford Horne <shorne@xxxxxxxxx>
Cc: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx>
Cc: Stephen Rothwell<sfr@xxxxxxxxxxxxxxxx>
Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/mm/mmu.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
--- a/arch/arm64/mm/mmu.c~arm-arm64-add-support-for-folded-p4d-page-tables-fix
+++ a/arch/arm64/mm/mmu.c
@@ -848,6 +848,24 @@ static void unmap_hotplug_pud_range(pgd_
} while (addr = next, addr < end);
}
+static void unmap_hotplug_p4d_range(pgd_t *pgd, unsigned long addr,
+ unsigned long end, bool free_mapped)
+{
+ unsigned long next;
+ pgd_t *p4dp, p4d;
+
+ do {
+ next = p4d_addr_end(addr, end);
+ p4dp = p4d_offset(pgd, addr);
+ p4d = READ_ONCE(*p4dp);
+ if (p4d_none(p4d))
+ continue;
+
+ WARN_ON(!p4d_present(p4d));
+ unmap_hotplug_pud_range(p4dp, addr, next, free_mapped);
+ } while (addr = next, addr < end);
+}
+
static void unmap_hotplug_range(unsigned long addr, unsigned long end,
bool free_mapped)
{
@@ -862,7 +880,7 @@ static void unmap_hotplug_range(unsigned
continue;
WARN_ON(!pgd_present(pgd));
- unmap_hotplug_pud_range(pgdp, addr, next, free_mapped);
+ unmap_hotplug_p4d_range(pgdp, addr, next, free_mapped);
} while (addr = next, addr < end);
}
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are
arm-arm64-add-support-for-folded-p4d-page-tables.patch
arm-arm64-add-support-for-folded-p4d-page-tables-fix.patch
h8300-remove-usage-of-__arch_use_5level_hack.patch
hexagon-remove-__arch_use_5level_hack.patch
ia64-add-support-for-folded-p4d-page-tables.patch
nios2-add-support-for-folded-p4d-page-tables.patch
openrisc-add-support-for-folded-p4d-page-tables.patch
powerpc-add-support-for-folded-p4d-page-tables.patch
sh-drop-__pxd_offset-macros-that-duplicate-pxd_index-ones.patch
sh-add-support-for-folded-p4d-page-tables.patch
unicore32-remove-__arch_use_5level_hack.patch
asm-generic-remove-pgtable-nop4d-hackh.patch
mm-remove-__arch_has_5level_hack-and-include-asm-generic-5level-fixuph.patch
