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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-04-01 00:32:30 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-04-01 00:32:30 +0400 |
| commit | adb3b1f3fc1c6edb501808ebf80a81e81c52eb73 (patch) | |
| tree | 9490e03ee23abda6a42cc0070aec5494c18ce9bf /arch | |
| parent | a75ee6ecd411a50bf4da927c2fdb2cb56246a2bd (diff) | |
| parent | 7ec6118c46699548b302149bba791166004c8428 (diff) | |
| download | linux-adb3b1f3fc1c6edb501808ebf80a81e81c52eb73.tar.xz | |
Merge tag 'parisc-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6
Pull PARISC misc updates from James Bottomley:
"This is a couple of minor updates (fixing lws futex locking and
removing some obsolete cpu_*_map calls)."
* tag 'parisc-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6:
[PARISC] remove references to cpu_*_map.
[PARISC] futex: Use same lock set as lws calls
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/parisc/include/asm/futex.h | 31 | ||||
| -rw-r--r-- | arch/parisc/kernel/smp.c | 3 |
2 files changed, 28 insertions, 6 deletions
diff --git a/arch/parisc/include/asm/futex.h b/arch/parisc/include/asm/futex.h index 2388bdb32832..49df14805a9b 100644 --- a/arch/parisc/include/asm/futex.h +++ b/arch/parisc/include/asm/futex.h @@ -8,6 +8,29 @@ #include <asm/atomic.h> #include <asm/errno.h> +/* The following has to match the LWS code in syscall.S. We have + sixteen four-word locks. */ + +static inline void +_futex_spin_lock_irqsave(u32 __user *uaddr, unsigned long int *flags) +{ + extern u32 lws_lock_start[]; + long index = ((long)uaddr & 0xf0) >> 2; + arch_spinlock_t *s = (arch_spinlock_t *)&lws_lock_start[index]; + local_irq_save(*flags); + arch_spin_lock(s); +} + +static inline void +_futex_spin_unlock_irqrestore(u32 __user *uaddr, unsigned long int *flags) +{ + extern u32 lws_lock_start[]; + long index = ((long)uaddr & 0xf0) >> 2; + arch_spinlock_t *s = (arch_spinlock_t *)&lws_lock_start[index]; + arch_spin_unlock(s); + local_irq_restore(*flags); +} + static inline int futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr) { @@ -26,7 +49,7 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr) pagefault_disable(); - _atomic_spin_lock_irqsave(uaddr, flags); + _futex_spin_lock_irqsave(uaddr, &flags); switch (op) { case FUTEX_OP_SET: @@ -71,7 +94,7 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr) ret = -ENOSYS; } - _atomic_spin_unlock_irqrestore(uaddr, flags); + _futex_spin_unlock_irqrestore(uaddr, &flags); pagefault_enable(); @@ -113,7 +136,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, * address. This should scale to a couple of CPUs. */ - _atomic_spin_lock_irqsave(uaddr, flags); + _futex_spin_lock_irqsave(uaddr, &flags); ret = get_user(val, uaddr); @@ -122,7 +145,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, *uval = val; - _atomic_spin_unlock_irqrestore(uaddr, flags); + _futex_spin_unlock_irqrestore(uaddr, &flags); return ret; } diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c index 5006e8ea3051..0bb1d63907f8 100644 --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -290,8 +290,7 @@ smp_cpu_init(int cpunum) mb(); /* Well, support 2.4 linux scheme as well. */ - if (cpu_isset(cpunum, cpu_online_map)) - { + if (cpu_online(cpunum)) { extern void machine_halt(void); /* arch/parisc.../process.c */ printk(KERN_CRIT "CPU#%d already initialized!\n", cpunum); |