[GIT PULL] RISC-V Cleanups and ABI Fixes for 4.15-rc2
From: Palmer Dabbelt
Date: Fri Dec 01 2017 - 16:39:18 EST
The following changes since commit 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323:
Linux 4.15-rc1 (2017-11-26 16:01:47 -0800)
are available in the git repository at:
ssh://git@xxxxxxxxxxxxxxxxxxx/pub/scm/linux/kernel/git/palmer/linux.git tags/riscv-for-linus-4.15-rc2_cleanups
for you to fetch changes up to 3b62de26cf5ef17340a0e986d3e53eb4f74f96d5:
RISC-V: Fixes for clean allmodconfig build (2017-12-01 13:31:31 -0800)
----------------------------------------------------------------
RISC-V Cleanups and ABI Fixes for 4.15-rc2
This tag contains a handful of small cleanups that are a result of
feedback that didn't make it into our original patch set, either because
the feedback hadn't been given yet, I missed the original emails, or
we weren't ready to submit the changes yet.
I've been maintaining the various cleanup patch sets I have as their own
branches, which I then merged together and signed. Each merge commit
has a short summary of the changes, and each branch is based on your
latest tag (4.15-rc1, in this case). If this isn't the right way to do
this then feel free to suggest something else, but it seems sane to me.
Here's a short summary of the changes, roughly in order of how
interesting they are.
* libgcc.h has been moved from include/lib, where it's the only member,
to include/linux. This is meant to avoid tab completion conflicts.
* VDSO entries for clock_get/gettimeofday/getcpu have been added. These
are simple syscalls now, but we want to let glibc use them from the
start so we can make them faster later.
* A VDSO entry for instruction cache flushing has been added so
userspace can flush the instruction cache.
* The VDSO symbol versions for __vdso_cmpxchg{32,64} have been removed,
as those VDSO entries don't actually exist.
* __io_writes has been corrected to respect the given type.
* A new READ_ONCE in arch_spin_is_locked().
* __test_and_op_bit_ord() is now actually ordered.
* Various small fixes throughout the tree to enable allmodconfig to
build cleanly.
* Removal of some dead code in our atomic support headers.
* Improvements to various comments in our atomic support headers.
----------------------------------------------------------------
Andrew Waterman (3):
RISC-V: Add VDSO entries for clock_get/gettimeofday/getcpu
RISC-V: Flush I$ when making a dirty page executable
RISC-V: Allow userspace to flush the instruction cache
Christoph Hellwig (1):
move libgcc.h to include/linux
Olof Johansson (8):
RISC-V: use generic serial.h
RISC-V: use RISCV_{INT,SHORT} instead of {INT,SHORT} for asm macros
RISC-V: io.h: type fixes for warnings
RISC-V: move empty_zero_page definition to C and export it
RISC-V: Export some expected symbols for modules
RISC-V: Provide stub of setup_profiling_timer()
RISC-V: Use define for get_cycles like other architectures
RISC-V: Add missing include
Palmer Dabbelt (16):
RISC-V: Remove __vdso_cmpxchg{32,64} symbol versions
RISC-V: Remove unused arguments from ATOMIC_OP
RISC-V: Comment on why {,cmp}xchg is ordered how it is
RISC-V: Remove __smp_bp__{before,after}_atomic
RISC-V: Remove smb_mb__{before,after}_spinlock()
RISC-V: __test_and_op_bit_ord should be strongly ordered
RISC-V: Add READ_ONCE in arch_spin_is_locked()
RISC-V: `sfence.vma` orderes the instruction cache
RISC-V: remove spin_unlock_wait()
RISC-V: Clean up an unused include
RISC-V: __io_writes should respect the length argument
RISC-V Atomic Cleanups
RISC-V: User-Visible Changes
RISC-V: __io_writes should respect the length argument
move libgcc.h to include/linux
RISC-V: Fixes for clean allmodconfig build
arch/riscv/include/asm/Kbuild | 1 +
arch/riscv/include/asm/asm.h | 12 ++--
arch/riscv/include/asm/atomic.h | 103 +++++++++++++++++----------------
arch/riscv/include/asm/barrier.h | 23 --------
arch/riscv/include/asm/bitops.h | 2 +-
arch/riscv/include/asm/bug.h | 6 +-
arch/riscv/include/asm/cacheflush.h | 30 ++++++++--
arch/riscv/include/asm/io.h | 18 +++---
arch/riscv/include/asm/mmu.h | 4 ++
arch/riscv/include/asm/mmu_context.h | 45 ++++++++++++++
arch/riscv/include/asm/pgtable.h | 58 ++++++++++---------
arch/riscv/include/asm/spinlock.h | 11 +---
arch/riscv/include/asm/timex.h | 3 +-
arch/riscv/include/asm/tlbflush.h | 7 ++-
arch/riscv/include/asm/vdso-syscalls.h | 28 +++++++++
arch/riscv/include/asm/vdso.h | 4 ++
arch/riscv/kernel/head.S | 3 -
arch/riscv/kernel/riscv_ksyms.c | 3 +
arch/riscv/kernel/setup.c | 5 ++
arch/riscv/kernel/smp.c | 55 ++++++++++++++++++
arch/riscv/kernel/sys_riscv.c | 33 ++++++++++-
arch/riscv/kernel/syscall_table.c | 2 +
arch/riscv/kernel/vdso/Makefile | 7 ++-
arch/riscv/kernel/vdso/clock_getres.S | 26 +++++++++
arch/riscv/kernel/vdso/clock_gettime.S | 26 +++++++++
arch/riscv/kernel/vdso/flush_icache.S | 31 ++++++++++
arch/riscv/kernel/vdso/getcpu.S | 26 +++++++++
arch/riscv/kernel/vdso/gettimeofday.S | 26 +++++++++
arch/riscv/kernel/vdso/vdso.lds.S | 7 ++-
arch/riscv/lib/delay.c | 1 +
arch/riscv/mm/Makefile | 1 +
arch/riscv/mm/cacheflush.c | 23 ++++++++
arch/riscv/mm/ioremap.c | 2 +-
include/{lib => linux}/libgcc.h | 0
lib/ashldi3.c | 2 +-
lib/ashrdi3.c | 2 +-
lib/cmpdi2.c | 2 +-
lib/lshrdi3.c | 2 +-
lib/muldi3.c | 2 +-
lib/ucmpdi2.c | 2 +-
40 files changed, 498 insertions(+), 146 deletions(-)
create mode 100644 arch/riscv/include/asm/vdso-syscalls.h
create mode 100644 arch/riscv/kernel/vdso/clock_getres.S
create mode 100644 arch/riscv/kernel/vdso/clock_gettime.S
create mode 100644 arch/riscv/kernel/vdso/flush_icache.S
create mode 100644 arch/riscv/kernel/vdso/getcpu.S
create mode 100644 arch/riscv/kernel/vdso/gettimeofday.S
create mode 100644 arch/riscv/mm/cacheflush.c
rename include/{lib => linux}/libgcc.h (100%)