Re: Build errors in v3.2-stable-queue

On Fri, 2016-08-05 at 19:40 -0700, Guenter Roeck wrote:

On 08/05/2016 04:26 PM, Ben Hutchings wrote:

quoted

On Sun, 2016-07-31 at 10:34 -0700, Guenter Roeck wrote:

quoted

Now I get a crash with the nosmp qemu test, and

Did you work out what introduced that?

Bisect says:

# bad: [c85164130167a51006876477e6b4044312960478] ecryptfs: don't
allow mmap when the lower fs doesn't support it
# good: [c5d5c18b211dabbfac73670c65dfa4243800adf7] Linux 3.2.81
git bisect start 'HEAD' 'v3.2.81'
# bad: [0d5b7d090ee63c7ab5530fea29beffe989ae385a] parisc: Fix
pagefault crash in unaligned __get_user() call
git bisect bad 0d5b7d090ee63c7ab5530fea29beffe989ae385a
# bad: [db17a77a32fe7703a433f428f65f28fddb20d5ba] MIPS: Sync icache &
dcache in set_pte_at
git bisect bad db17a77a32fe7703a433f428f65f28fddb20d5ba
# good: [9f4faf23b3c3d719a1005364ac3cca8cb1ca07ca] char: Drop bogus
dependency of DEVPORT on !M68K
git bisect good 9f4faf23b3c3d719a1005364ac3cca8cb1ca07ca
# good: [180309d63478b762234b229abf37b0ed4d95fef7] MIPS: Adjust
set_pte() SMP fix to handle R10000_LLSC_WAR
git bisect good 180309d63478b762234b229abf37b0ed4d95fef7
# good: [dcbaa9382ed2ded2de553633e58791d057e76ad2] powerpc/mm/hash64:
Factor out hash preload psize check
git bisect good dcbaa9382ed2ded2de553633e58791d057e76ad2
# good: [ad1e677bf950f3943e8a3cdd546b2c6202ea7ed4] sched/loadavg: Fix
loadavg artifacts on fully idle and on fully loaded systems
git bisect good ad1e677bf950f3943e8a3cdd546b2c6202ea7ed4
# first bad commit: [db17a77a32fe7703a433f428f65f28fddb20d5ba] MIPS:
Sync icache & dcache in set_pte_at

After reverting that patch, the problem is gone.

Turns out 3.16 is affected by the same problem, and reverting the
patch there fixes it as well.

Oh well, then I'll revert this and the follow-up.

Ben.

-- 
Ben Hutchings
Beware of bugs in the above code;
I have only proved it correct, not tried it. - Donald Knuth