95c354fe9f
The break_lock data structure and code for spinlocks is quite nasty. Not only does it double the size of a spinlock but it changes locking to a potentially less optimal trylock. Put all of that under CONFIG_GENERIC_LOCKBREAK, and introduce a __raw_spin_is_contended that uses the lock data itself to determine whether there are waiters on the lock, to be used if CONFIG_GENERIC_LOCKBREAK is not set. Rename need_lockbreak to spin_needbreak, make it use spin_is_contended to decouple it from the spinlock implementation, and make it typesafe (rwlocks do not have any need_lockbreak sites -- why do they even get bloated up with that break_lock then?). Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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| .. | ||
| au1000 | ||
| basler/excite | ||
| bcm47xx | ||
| boot | ||
| cobalt | ||
| configs | ||
| dec | ||
| emma2rh | ||
| fw | ||
| gt64120/wrppmc | ||
| jazz | ||
| jmr3927 | ||
| kernel | ||
| lasat | ||
| lemote/lm2e | ||
| lib | ||
| math-emu | ||
| mips-boards | ||
| mipssim | ||
| mm | ||
| oprofile | ||
| pci | ||
| philips/pnx8550 | ||
| pmc-sierra | ||
| sgi-ip22 | ||
| sgi-ip27 | ||
| sgi-ip32 | ||
| sibyte | ||
| sni | ||
| tx4927 | ||
| tx4938 | ||
| vr41xx | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| defconfig | ||