[GIT PULL] RISC-V updates for v5.5-rc4

[Paul Walmsley]

Linus,

The following changes since commit 46cf053efec6a3a5f343fead837777efe8252a46:

  Linux 5.5-rc3 (2019-12-22 17:02:23 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git tags/riscv/for-v5.5-rc4

for you to fetch changes up to 1833e327a5ea1d1f356fbf6ded0760c9ff4b0594:

  riscv: export flush_icache_all to modules (2019-12-27 21:51:01 -0800)

----------------------------------------------------------------
RISC-V updates for v5.5-rc4

One important fix for RISC-V:

- Redirect any incoming syscall with an ID less than -1 to
  sys_ni_syscall, rather than allowing them to fall through into the
  syscall handler.

and two minor build fixes:

- Export __asm_copy_{from,to}_user() from where they are defined.
  This fixes a build error triggered by some randconfigs.

- Export flush_icache_all().  I'd resisted this before, since
  historically we didn't want modules to be able to flush the I$
  directly; but apparently everyone else is doing it now.

----------------------------------------------------------------
David Abdurachmanov (1):
      riscv: reject invalid syscalls below -1

Luc Van Oostenryck (1):
      riscv: fix compile failure with EXPORT_SYMBOL() & !MMU

Olof Johansson (1):
      riscv: export flush_icache_all to modules

 arch/riscv/kernel/entry.S       | 1 +
 arch/riscv/kernel/riscv_ksyms.c | 3 ---
 arch/riscv/lib/uaccess.S        | 4 ++++
 arch/riscv/mm/cacheflush.c      | 1 +
 4 files changed, 6 insertions(+), 3 deletions(-)


Kernel object size difference:
   text	   data	    bss	    dec	    hex	filename
6896332	2329908	 313920	9540160	 919240	vmlinux.rv64.orig
6896379	2329908	 313920	9540207	 91926f	vmlinux.rv64.patched
6656967	1939072	 257576	8853615	 87186f	vmlinux.rv32.orig
6656994	1939072	 257576	8853642	 87188a	vmlinux.rv32.patched
1171666	 353368	 130024	1655058	 194112	vmlinux.nommu_virt.orig
1171674	 353368	 130024	1655066	 19411a	vmlinux.nommu_virt.patched