Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "A larger-than-usual batch of arm64 fixes for -rc3.

  The bulk of the fixes are dealing with a bunch of issues with the
  build system from the compat vDSO, which unfortunately led to some
  significant Makefile rework to manage the horrible combinations of
  toolchains that we can end up needing to drive simultaneously.

  We came close to disabling the thing entirely, but Vincenzo was quick
  to spin up some patches and I ended up picking up most of the bits
  that were left [*]. Future work will look at disentangling the header
  files properly.

  Other than that, we have some important fixes all over, including one
  papering over the miscompilation fallout from forcing
  CONFIG_OPTIMIZE_INLINING=y, which I'm still unhappy about. Harumph.

  We've still got a couple of open issues, so I'm expecting to have some
  more fixes later this cycle.

  Summary:

   - Numerous fixes to the compat vDSO build system, especially when
     combining gcc and clang

   - Fix parsing of PAR_EL1 in spurious kernel fault detection

   - Partial workaround for Neoverse-N1 erratum #1542419

   - Fix IRQ priority masking on entry from compat syscalls

   - Fix advertisment of FRINT HWCAP to userspace

   - Attempt to workaround inlining breakage with '__always_inline'

   - Fix accidental freeing of parent SVE state on fork() error path

   - Add some missing NULL pointer checks in instruction emulation init

   - Some formatting and comment fixes"

[*] Will's final fixes were

        Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
        Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>

    but they were already in linux-next by then and he didn't rebase
    just to add those.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (21 commits)
  arm64: armv8_deprecated: Checking return value for memory allocation
  arm64: Kconfig: Make CONFIG_COMPAT_VDSO a proper Kconfig option
  arm64: vdso32: Rename COMPATCC to CC_COMPAT
  arm64: vdso32: Pass '--target' option to clang via VDSO_CAFLAGS
  arm64: vdso32: Don't use KBUILD_CPPFLAGS unconditionally
  arm64: vdso32: Move definition of COMPATCC into vdso32/Makefile
  arm64: Default to building compat vDSO with clang when CONFIG_CC_IS_CLANG
  lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO
  arm64: vdso32: Remove jump label config option in Makefile
  arm64: vdso32: Detect binutils support for dmb ishld
  arm64: vdso: Remove stale files from old assembly implementation
  arm64: vdso32: Fix broken compat vDSO build warnings
  arm64: mm: fix spurious fault detection
  arm64: ftrace: Ensure synchronisation in PLT setup for Neoverse-N1 #1542419
  arm64: Fix incorrect irqflag restore for priority masking for compat
  arm64: mm: avoid virt_to_phys(init_mm.pgd)
  arm64: cpufeature: Effectively expose FRINT capability to userspace
  arm64: Mark functions using explicit register variables as '__always_inline'
  docs: arm64: Fix indentation and doc formatting
  arm64/sve: Fix wrong free for task->thread.sve_state
  ...

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