linux_dsm_epyc7002/arch/x86
Linus Torvalds 9716e57a01 Peter Zijlstras rework of atomics and fallbacks. This solves two problems:
1) Compilers uninline small atomic_* static inline functions which can
      expose them to instrumentation.
 
   2) The instrumentation of atomic primitives was done at the architecture
      level while composites or fallbacks were provided at the generic level.
      As a result there are no uninstrumented variants of the fallbacks.
 
 Both issues were in the way of fully isolating fragile entry code pathes
 and especially the text poke int3 handler which is prone to an endless
 recursion problem when anything in that code path is about to be
 instrumented. This was always a problem, but got elevated due to the new
 batch mode updates of tracing.
 
 The solution is to mark the functions __always_inline and to flip the
 fallback and instrumentation so the non-instrumented variants are at the
 architecture level and the instrumentation is done in generic code.
 
 The latter introduces another fallback variant which will go away once all
 architectures have been moved over to arch_atomic_*.
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Merge tag 'locking-urgent-2020-06-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull atomics rework from Thomas Gleixner:
 "Peter Zijlstras rework of atomics and fallbacks. This solves two
  problems:

   1) Compilers uninline small atomic_* static inline functions which
      can expose them to instrumentation.

   2) The instrumentation of atomic primitives was done at the
      architecture level while composites or fallbacks were provided at
      the generic level. As a result there are no uninstrumented
      variants of the fallbacks.

  Both issues were in the way of fully isolating fragile entry code
  pathes and especially the text poke int3 handler which is prone to an
  endless recursion problem when anything in that code path is about to
  be instrumented. This was always a problem, but got elevated due to
  the new batch mode updates of tracing.

  The solution is to mark the functions __always_inline and to flip the
  fallback and instrumentation so the non-instrumented variants are at
  the architecture level and the instrumentation is done in generic
  code.

  The latter introduces another fallback variant which will go away once
  all architectures have been moved over to arch_atomic_*"

* tag 'locking-urgent-2020-06-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/atomics: Flip fallbacks and instrumentation
  asm-generic/atomic: Use __always_inline for fallback wrappers
2020-06-11 18:27:19 -07:00
..
boot mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
configs compiler: remove CONFIG_OPTIMIZE_INLINING entirely 2020-04-07 10:43:42 -07:00
crypto There are a lot of objtool changes in this cycle, all across the map: 2020-06-01 13:13:00 -07:00
entry mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
events mmap locking API: convert mmap_sem comments 2020-06-09 09:39:14 -07:00
hyperv mm: remove the pgprot argument to __vmalloc 2020-06-02 10:59:11 -07:00
ia32 Merge branch 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2020-06-04 14:07:08 -07:00
include Peter Zijlstras rework of atomics and fallbacks. This solves two problems: 2020-06-11 18:27:19 -07:00
kernel A set of fixes and updates for x86: 2020-06-11 15:54:31 -07:00
kvm Merge branch 'uaccess.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-06-10 16:02:54 -07:00
lib X86 timer specific updates: 2020-06-03 10:18:09 -07:00
math-emu Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
mm maccess: always use strict semantics for probe_kernel_read 2020-06-09 09:39:15 -07:00
net bpf, i386: Remove unneeded conversion to bool 2020-05-07 16:29:14 +02:00
oprofile
pci Merge branch 'pci/virtualization' 2020-06-04 12:59:13 -05:00
platform power supply and reset changes for the v5.8 series 2020-06-10 11:28:35 -07:00
power mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
purgatory Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
ras
realmode mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
tools .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
um mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
video
xen mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Kbuild
Kconfig dma-mapping updates for 5.8, part 1 2020-06-06 11:43:23 -07:00
Kconfig.assembler x86/delay: Introduce TPAUSE delay 2020-05-07 16:06:20 +02:00
Kconfig.cpu x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs 2020-01-13 18:02:53 +01:00
Kconfig.debug x86: mm: use ARCH_HAS_DEBUG_WX instead of arch defined 2020-06-03 20:09:50 -07:00
Makefile x86/boot/build: Make 'make bzlilo' not depend on vmlinux or $(obj)/bzImage 2020-04-21 18:10:28 +02:00
Makefile_32.cpu
Makefile.um