Steven Price e47690d756 x86: mm: avoid allocating struct mm_struct on the stack ... struct mm_struct is quite large (~1664 bytes) and so allocating on the stack may cause problems as the kernel stack size is small. Since ptdump_walk_pgd_level_core() was only allocating the structure so that it could modify the pgd argument we can instead introduce a pgd override in struct mm_walk and pass this down the call stack to where it is needed. Since the correct mm_struct is now being passed down, it is now also unnecessary to take the mmap_sem semaphore because ptdump_walk_pgd() will now take the semaphore on the real mm. [steven.price@arm.com: restore missed arm64 changes] Link: http://lkml.kernel.org/r/20200108145710.34314-1-steven.price@arm.com Link: http://lkml.kernel.org/r/20200108145710.34314-1-steven.price@arm.com Signed-off-by: Steven Price <steven.price@arm.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: James Morse <james.morse@arm.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: "Liang, Kan" <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Zong Li <zong.li@sifive.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-02-04 03:05:25 +00:00
..
cache.S	arm64: mm: Use modern annotations for assembly functions	2020-01-08 12:23:38 +00:00
context.c	arm64: context: Free up kernel ASIDs if KPTI is not in use	2020-01-16 12:45:05 +00:00
copypage.c
dma-mapping.c	dma-mapping: drop the dev argument to arch_sync_dma_for_*	2019-11-20 20:31:38 +01:00
dump.c	x86: mm: avoid allocating struct mm_struct on the stack	2020-02-04 03:05:25 +00:00
extable.c
fault.c	arm64: Revert support for execute-only user mappings	2020-01-06 10:10:07 -08:00
flush.c	mm: introduce page_size()	2019-09-24 15:54:08 -07:00
hugetlbpage.c
init.c	arm64: mm: Fix initialisation of DMA zones on non-NUMA systems	2019-12-04 11:25:20 +00:00
ioremap.c	arm64: remove __iounmap	2019-09-04 13:12:26 +01:00
kasan_init.c	arm64: memory: rename VA_START to PAGE_END	2019-08-14 17:06:58 +01:00
Makefile	arm64: mm: convert mm/dump.c to use walk_page_range()	2020-02-04 03:05:25 +00:00
mmap.c	arm64, mm: move generic mmap layout functions to mm	2019-09-24 15:54:11 -07:00
mmu.c	arm64: mm: convert mm/dump.c to use walk_page_range()	2020-02-04 03:05:25 +00:00
numa.c	arm64: Replace strncmp with str_has_prefix	2019-08-05 11:06:34 +01:00
pageattr.c	mm: change_memory_common: add spaces for * operator	2020-01-08 17:30:33 +00:00
pgd.c	mm: consolidate pgtable_cache_init() and pgd_cache_init()	2019-09-24 15:54:09 -07:00
physaddr.c
proc.S	Merge branch 'for-next/asm-annotations' into for-next/core	2020-01-22 11:34:21 +00:00
ptdump_debugfs.c	arm64: mm: convert mm/dump.c to use walk_page_range()	2020-02-04 03:05:25 +00:00