Jonathan Marek d8a719059b Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge" ... This reverts commit c742199a01. c742199a01 ("mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge") breaks arm64 in at least two ways for configurations where PUD or PMD folding occur: 1. We no longer install huge-vmap mappings and silently fall back to page-granular entries, despite being able to install block entries at what is effectively the PGD level. 2. If the linear map is backed with block mappings, these will now silently fail to be created in alloc_init_pud(), causing a panic early during boot. The pgtable selftests caught this, although a fix has not been forthcoming and Christophe is AWOL at the moment, so just revert the change for now to get a working -rc3 on which we can queue patches for 5.15. A simple revert breaks the build for 32-bit PowerPC 8xx machines, which rely on the default function definitions when the corresponding page-table levels are folded, since commit a6a8f7c4aa ("powerpc/8xx: add support for huge pages on VMAP and VMALLOC"), eg: powerpc64-linux-ld: mm/vmalloc.o: in function `vunmap_pud_range': linux/mm/vmalloc.c:362: undefined reference to `pud_clear_huge' To avoid that, add stubs for pud_clear_huge() and pmd_clear_huge() in arch/powerpc/mm/nohash/8xx.c as suggested by Christophe. Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Fixes: c742199a01 ("mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge") Signed-off-by: Jonathan Marek <jonathan@marek.ca> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Marc Zyngier <maz@kernel.org> [mpe: Fold in 8xx.c changes from Christophe and mention in change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/linux-arm-kernel/CAMuHMdXShORDox-xxaeUfDW3wx2PeggFSqhVSHVZNKCGK-y_vQ@mail.gmail.com/ Link: https://lore.kernel.org/r/20210717160118.9855-1-jonathan@marek.ca Link: https://lore.kernel.org/r/87r1fs1762.fsf@mpe.ellerman.id.au Signed-off-by: Will Deacon <will@kernel.org>		2021-07-21 11:28:09 +01:00
..
acpi	IOMMU Updates for Linux v5.14	2021-07-02 13:22:47 -07:00
asm-generic	This pull request contains the following changes for UML:	2021-07-09 10:19:13 -07:00
clocksource
crypto
drm
dt-bindings	ARM: Drivers for 5.14	2021-07-10 09:46:20 -07:00
keys
kunit	linux-kselftest-kunit-fixes-5.14-rc1	2021-07-02 12:58:26 -07:00
kvm
linux	Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge"	2021-07-21 11:28:09 +01:00
math-emu
media
memory
misc
net	Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2021-07-03 11:30:04 -07:00
pcmcia
ras
rdma
scsi	SCSI misc on 20210702	2021-07-02 15:14:36 -07:00
soc	ARM: Drivers for 5.14	2021-07-10 09:46:20 -07:00
sound	ASoC: Updates for v5.14	2021-07-01 08:36:12 +02:00
target
trace	Merge branch 'core-rcu-2021.07.04' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu	2021-07-04 12:58:33 -07:00
uapi	block-5.14-2021-07-08	2021-07-09 12:05:33 -07:00
vdso
video
xen	xen: sync include/xen/interface/io/ring.h with Xen's newest version	2021-07-05 09:49:45 +02:00