Re: linux-next: Tree for Jan 7

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On Wed, Jan 07, 2015 at 08:33:10AM -0800, Paul E. McKenney wrote:
> On Wed, Jan 07, 2015 at 06:26:56AM -0800, Guenter Roeck wrote:
> > On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> > > Hi all,
> > > 
> > > Changes since 20150106:
> > > 
> > > *crickets*
> > > 
> > > Non-merge commits (relative to Linus' tree): 1350
> > >  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> > > 
> > > ----------------------------------------------------------------------------
> > > 
> > 
> > New build failure for sh:dreamcast_defconfig:
> > 
> > arch/sh/mm/gup.c: In function 'gup_get_pte':
> > arch/sh/mm/gup.c:20:2: error: invalid initializer
> > make[1]: *** [arch/sh/mm/gup.o] Error 1
> > 
> > bisect log:
> > 
> > # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
> > # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
> > git bisect start 'HEAD' 'v3.19-rc3'
> > # good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
> > git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
> > # good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
> > git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
> > # good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
> > git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
> > # bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
> > git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
> > # good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
> > git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
> > # good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
> > git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
> > # good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
> > git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
> > # bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
> > # good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
> > git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
> > # good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
> > git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
> > # first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > 
> > Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?
> 
> That is my belief.  What happens when you try it?
> 
Build passes, and my qemu tests pass as well. That doesn't mean
that the change is correct, of course, since I don't know if the code
in question is executed.

Should I send a patch with the change ?

Guenter
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