mirror of https://github.com/torvalds/linux.git
fba7cd681b
The recent decoupling of pagefault disable and preempt disable added an
explicit preempt_disable/enable() pair to the futex_atomic_cmpxchg_inatomic()
implementation in asm-generic/futex.h. But it forgot to add preempt_enable()
calls to the error handling code pathes, which results in a preemption count
imbalance.
This is observable on boot when the test for atomic_cmpxchg() is calling
futex_atomic_cmpxchg_inatomic() on a NULL pointer.
Add the missing preempt_enable() calls to the error handling code pathes.
[ tglx: Massaged changelog ]
Fixes:
|
||
|---|---|---|
| .. | ||
| bitops | ||
| 4level-fixup.h | ||
| Kbuild.asm | ||
| asm-offsets.h | ||
| atomic-long.h | ||
| atomic.h | ||
| atomic64.h | ||
| audit_change_attr.h | ||
| audit_dir_write.h | ||
| audit_read.h | ||
| audit_signal.h | ||
| audit_write.h | ||
| barrier.h | ||
| bitops.h | ||
| bitsperlong.h | ||
| bug.h | ||
| bugs.h | ||
| cache.h | ||
| cacheflush.h | ||
| checksum.h | ||
| clkdev.h | ||
| cmpxchg-local.h | ||
| cmpxchg.h | ||
| cputime.h | ||
| cputime_jiffies.h | ||
| cputime_nsecs.h | ||
| current.h | ||
| delay.h | ||
| device.h | ||
| div64.h | ||
| dma-contiguous.h | ||
| dma.h | ||
| early_ioremap.h | ||
| emergency-restart.h | ||
| exec.h | ||
| fb.h | ||
| fixmap.h | ||
| ftrace.h | ||
| futex.h | ||
| getorder.h | ||
| gpio.h | ||
| hardirq.h | ||
| hugetlb.h | ||
| hw_irq.h | ||
| ide_iops.h | ||
| int-ll64.h | ||
| io.h | ||
| ioctl.h | ||
| iomap.h | ||
| irq.h | ||
| irq_regs.h | ||
| irq_work.h | ||
| irqflags.h | ||
| kdebug.h | ||
| kmap_types.h | ||
| kvm_para.h | ||
| libata-portmap.h | ||
| linkage.h | ||
| local.h | ||
| local64.h | ||
| mcs_spinlock.h | ||
| memory_model.h | ||
| mm-arch-hooks.h | ||
| mm_hooks.h | ||
| mmu.h | ||
| mmu_context.h | ||
| module.h | ||
| msi.h | ||
| mutex-dec.h | ||
| mutex-null.h | ||
| mutex-xchg.h | ||
| mutex.h | ||
| page.h | ||
| param.h | ||
| parport.h | ||
| pci.h | ||
| pci_iomap.h | ||
| percpu.h | ||
| pgalloc.h | ||
| pgtable-nopmd.h | ||
| pgtable-nopud.h | ||
| pgtable.h | ||
| preempt.h | ||
| ptrace.h | ||
| qrwlock.h | ||
| qrwlock_types.h | ||
| qspinlock.h | ||
| qspinlock_types.h | ||
| resource.h | ||
| rtc.h | ||
| rwsem.h | ||
| seccomp.h | ||
| sections.h | ||
| segment.h | ||
| serial.h | ||
| siginfo.h | ||
| signal.h | ||
| simd.h | ||
| sizes.h | ||
| spinlock.h | ||
| statfs.h | ||
| string.h | ||
| switch_to.h | ||
| syscall.h | ||
| syscalls.h | ||
| termios-base.h | ||
| termios.h | ||
| timex.h | ||
| tlb.h | ||
| tlbflush.h | ||
| topology.h | ||
| trace_clock.h | ||
| uaccess-unaligned.h | ||
| uaccess.h | ||
| unaligned.h | ||
| unistd.h | ||
| user.h | ||
| vga.h | ||
| vmlinux.lds.h | ||
| vtime.h | ||
| word-at-a-time.h | ||
| xor.h | ||