62e8a3258b
This patch makes sure that atomic_{read,set}() are at least
{READ,WRITE}_ONCE().
We already had the 'requirement' that atomic_read() should use
ACCESS_ONCE(), and most archs had this, but a few were lacking.
All are now converted to use READ_ONCE().
And, by a symmetry and general paranoia argument, upgrade atomic_set()
to use WRITE_ONCE().
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: james.hogan@imgtec.com
Cc: linux-kernel@vger.kernel.org
Cc: oleg@redhat.com
Cc: will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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| .. | ||
| Kbuild | ||
| addrspace.h | ||
| asm-offsets.h | ||
| asm.h | ||
| atomic.h | ||
| barrier.h | ||
| bitops.h | ||
| bug.h | ||
| bugs.h | ||
| cache.h | ||
| cacheflush.h | ||
| checksum.h | ||
| cmpxchg.h | ||
| current.h | ||
| dma-mapping.h | ||
| dma.h | ||
| elf.h | ||
| fb.h | ||
| ftrace.h | ||
| gpio.h | ||
| hardirq.h | ||
| hw_irq.h | ||
| io.h | ||
| irq.h | ||
| irqflags.h | ||
| kdebug.h | ||
| kmap_types.h | ||
| kprobes.h | ||
| linkage.h | ||
| mmu.h | ||
| mmu_context.h | ||
| module.h | ||
| mutex.h | ||
| ocd.h | ||
| page.h | ||
| pci.h | ||
| pgalloc.h | ||
| pgtable-2level.h | ||
| pgtable.h | ||
| processor.h | ||
| ptrace.h | ||
| serial.h | ||
| setup.h | ||
| shmparam.h | ||
| signal.h | ||
| string.h | ||
| switch_to.h | ||
| syscalls.h | ||
| sysreg.h | ||
| termios.h | ||
| thread_info.h | ||
| timex.h | ||
| tlb.h | ||
| tlbflush.h | ||
| traps.h | ||
| types.h | ||
| uaccess.h | ||
| ucontext.h | ||
| unaligned.h | ||
| unistd.h | ||
| user.h | ||