Merge tag 'riscv-for-linus-4.15-rc2_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux
Pull RISC-V cleanups and ABI fixes from Palmer Dabbelt:
"This 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"
* tag 'riscv-for-linus-4.15-rc2_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux: (23 commits)
RISC-V: __io_writes should respect the length argument
move libgcc.h to include/linux
RISC-V: Clean up an unused include
RISC-V: Allow userspace to flush the instruction cache
RISC-V: Flush I$ when making a dirty page executable
RISC-V: Add missing include
RISC-V: Use define for get_cycles like other architectures
RISC-V: Provide stub of setup_profiling_timer()
RISC-V: Export some expected symbols for modules
RISC-V: move empty_zero_page definition to C and export it
RISC-V: io.h: type fixes for warnings
RISC-V: use RISCV_{INT,SHORT} instead of {INT,SHORT} for asm macros
RISC-V: use generic serial.h
RISC-V: remove spin_unlock_wait()
RISC-V: `sfence.vma` orderes the instruction cache
RISC-V: Add READ_ONCE in arch_spin_is_locked()
RISC-V: __test_and_op_bit_ord should be strongly ordered
RISC-V: Remove smb_mb__{before,after}_spinlock()
RISC-V: Remove __smp_bp__{before,after}_atomic
RISC-V: Comment on why {,cmp}xchg is ordered how it is
...
