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linux/arch/x86/mm
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Andy Lutomirski a493d1ca1a x86/membarrier: Get rid of a dubious optimization 
sync_core_before_usermode() had an incorrect optimization.  If the kernel
returns from an interrupt, it can get to usermode without IRET. It just has
to schedule to a different task in the same mm and do SYSRET.  Fortunately,
there were no callers of sync_core_before_usermode() that could have had
in_irq() or in_nmi() equal to true, because it's only ever called from the
scheduler.

While at it, clarify a related comment.

Fixes: 70216e18e519 ("membarrier: Provide core serializing command, *_SYNC_CORE")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/5afc7632be1422f91eaf7611aaaa1b5b8580a086.1607058304.git.luto@kernel.org
2020-12-09 09:37:42 +01:00
..
pat
x86/mm/pat: Don't flush cache if hardware enforces cache coherency across encryption domnains
2020-09-18 10:47:00 +02:00
amdtopology.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
cpu_entry_area.c
x86/dumpstack/64: Add noinstr version of get_stack_info()
2020-09-09 11:33:19 +02:00
debug_pagetables.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
dump_pagetables.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
extable.c
This feature enhances the current guest memory encryption support
2020-10-14 10:21:34 -07:00
fault.c
ARM:
2020-10-23 11:17:56 -07:00
highmem_32.c
arch/kunmap_atomic: consolidate duplicate code
2020-06-04 19:06:22 -07:00
hugetlbpage.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
ident_map.c
x86/mm: Stop pretending pgtable_l5_enabled is a variable
2018-05-19 11:56:57 +02:00
init_32.c
A set of locking fixes and updates:
2020-08-10 19:07:44 -07:00
init_64.c
x86/mm/64: Update comment in preallocate_vmalloc_pages()
2020-08-15 13:56:16 +02:00
init.c
x86/mm: Fix -Wmissing-prototypes warnings for arch/x86/mm/init.c
2020-06-17 10:45:46 +02:00
iomap_32.c
x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h>
2019-12-10 10:12:55 +01:00
ioremap.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
kasan_init_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
kaslr.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
kmmio.c
Misc changes:
2020-06-05 11:18:53 -07:00
maccess.c
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
2020-06-17 10:57:41 -07:00
Makefile
kbuild: remove cc-option test of -fno-stack-protector
2020-07-07 11:13:10 +09:00
mem_encrypt_boot.S
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
mem_encrypt_identity.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
mem_encrypt.c
x86/head/64: Check SEV encryption before switching to kernel page-table
2020-10-29 18:09:59 +01:00
mm_internal.h
x86/mm: thread pgprot_t through init_memory_mapping()
2020-04-10 15:36:21 -07:00
mmap.c
x86/mm/mmap: Fix -Wmissing-prototypes warnings
2020-04-22 20:19:48 +02:00
mmio-mod.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
numa_32.c
x86/mm: Drop deprecated DISCONTIGMEM support for 32-bit
2020-05-28 18:34:30 +02:00
numa_64.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
numa_emulation.c
x86/numa: cleanup configuration dependent command-line options
2020-10-13 18:38:27 -07:00
numa_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
numa.c
mm: fix phys_to_target_node() and memory_add_physaddr_to_nid() exports
2020-11-22 10:48:22 -08:00
pf_in.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pf_in.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pgtable_32.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
pgtable.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
physaddr.c
mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions
2019-12-10 10:12:55 +01:00
physaddr.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pkeys.c
mm/vma: introduce VM_ACCESS_FLAGS
2020-04-10 15:36:21 -07:00
pti.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
setup_nx.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
srat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
testmmiotrace.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
tlb.c
x86/membarrier: Get rid of a dubious optimization
2020-12-09 09:37:42 +01:00