[GIT PULL] arm64 fixes for -rc4

[Will Deacon]

Hi Linus,

Please pull these three arm64 fixes for -rc4. One of them is just a
trivial documentation fix, whereas the other two address a warning in
the kexec code and a crash in ftrace on systems implementing BTI. The
latter patch has a couple of ugly ifdefs which Mark plans to clean up
separately, but as-is the patch is straightforward for backporting to
stable kernels.

Cheers,

Will

--->8

The following changes since commit 94902d849e85093aafcdbea2be8e2beff47233e6:

  arm64: uaccess: avoid blocking within critical sections (2021-11-24 09:16:26 +0000)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git tags/arm64-fixes

for you to fetch changes up to 35b6b28e69985eafb20b3b2c7bd6eca452b56b53:

  arm64: ftrace: add missing BTIs (2021-12-02 10:18:32 +0000)

----------------------------------------------------------------
arm64 fixes for -rc4

- Add missing BTI landing instructions to the ftrace*_caller trampolines

- Fix kexec() WARN when DEBUG_VIRTUAL is enabled

- Fix PAC documentation by removing stale references to compiler flags

----------------------------------------------------------------
Kuan-Ying Lee (1):
      arm64: update PAC description for kernel

Mark Rutland (2):
      arm64: kexec: use __pa_symbol(empty_zero_page)
      arm64: ftrace: add missing BTIs

 Documentation/arm64/pointer-authentication.rst | 9 ++++-----
 arch/arm64/kernel/entry-ftrace.S               | 6 ++++++
 arch/arm64/kernel/machine_kexec.c              | 2 +-
 3 files changed, 11 insertions(+), 6 deletions(-)