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Date: Tue, 4 Feb 2020 15:41:47 +0200 From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, Trond Myklebust <trond.myklebust@...merspace.com>, Anna Schumaker <anna.schumaker@...app.com>, "Paul E. McKenney" <paulmck@...nel.org>, Josh Triplett <josh@...htriplett.org>, Steven Rostedt <rostedt@...dmis.org>, Arnd Bergmann <arnd@...db.de> Subject: Re: [PATCH v1] kernel.h: Split out mathematical helpers On Wed, Oct 02, 2019 at 05:13:37PM -0700, Andrew Morton wrote: > On Tue, 10 Sep 2019 13:51:05 +0300 Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote: > > > kernel.h is being used as a dump for all kinds of stuff for a long time. > > Here is the attempt to start cleaning it up by splitting out mathematical > > helpers. > > > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> > > --- > > fs/nfs/callback_proc.c | 1 + > > include/linux/bitops.h | 3 +- > > include/linux/dcache.h | 1 + > > include/linux/iommu-helper.h | 1 + > > include/linux/kernel.h | 143 -------------------------------- > > include/linux/math.h | 149 ++++++++++++++++++++++++++++++++++ > > include/linux/rcu_node_tree.h | 2 + > > I'm not really understanding how this works, apart from "dumb luck". Looks like it right now. > Random example: mm/percpu.c needs roundup(), so how does it include the > new math.h? > > ....... ./arch/x86/include/asm/uprobes.h > ........ ./include/linux/notifier.h > ......... ./include/linux/mutex.h > ......... ./include/linux/srcu.h > .......... ./include/linux/workqueue.h > ........... ./include/linux/timer.h > ............ ./include/linux/ktime.h > ............. ./include/linux/time.h > .............. ./include/linux/time32.h > ............... ./include/linux/timex.h > ................ ./include/uapi/linux/timex.h > ................. ./include/linux/time.h > ................ ./include/uapi/linux/param.h > ................. ./arch/x86/include/generated/uapi/asm/param.h > .................. ./include/asm-generic/param.h > ................... ./include/uapi/asm-generic/param.h > ................ ./arch/x86/include/asm/timex.h > ................. ./arch/x86/include/asm/tsc.h > ............. ./include/linux/jiffies.h > .............. ./arch/x86/include/generated/uapi/asm/param.h > .............. ./include/generated/timeconst.h > ............. ./include/linux/timekeeping.h > ............. ./include/linux/timekeeping32.h > ............ ./include/linux/debugobjects.h > .......... ./include/linux/rcu_segcblist.h > .......... ./include/linux/srcutree.h > ........... ./include/linux/rcu_node_tree.h > ............ ./include/linux/math.h > > oh, like that. Long way to clean up this... > It seems rather unreliable. Perhaps a "#include <linux/math.h>" was > intended in kernel.h? Yeah, this needs to be done for time being in hope that it will be clearer in the future. I'll do this in v2. Thanks for review! -- With Best Regards, Andy Shevchenko
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