On Fri, 15 Dec 2017 22:04:49 +0000, Matthew Wilcox wrote: > > From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> > > In a non-critical path, irqdomain wants to know how many entries are > stored in the xarray, so add xa_count(). This is a pretty straightforward > conversion; mostly just removing now-redundant locking. The only thing > of note is just how much simpler irq_domain_fix_revmap() becomes. > > Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> > --- > include/linux/irqdomain.h | 10 ++++------ > include/linux/xarray.h | 1 + > kernel/irq/irqdomain.c | 39 ++++++++++----------------------------- > lib/xarray.c | 25 +++++++++++++++++++++++++ > 4 files changed, 40 insertions(+), 35 deletions(-) I certainly welcome the simplification this provides. As for xa_count(), I'm trying to convince myself that the code under CONFIG_IRQ_DOMAIN_DEBUG is now completely superseded by CONFIG_GENERIC_IRQ_DEBUGFS, and that there would be more value in getting rid of it rather than keeping it on life support. Until then, the 1:1 replacement is good enough. Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx> M.
