Hi Greg, > On Fri, 9 Jun 2017 17:26:38 -0700, Paul Burton wrote: > > Replace the macro definition of __cmpxchg() with an inline function, > > which is easier to read & modify. The cmpxchg() & cmpxchg_local() > > macros are adjusted to call the new __cmpxchg() function. > > > > Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx> > > Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> > > Cc: linux-mips@xxxxxxxxxxxxxx > > I think this patch is breaking user space for me. I say "think" > because it is a bit tricky to bisect for the few patches previous to this one > since they won't compile cleanly for me (due to this > https://www.spinics.net/lists/mips/msg68727.html). > > I have a Cavium Octeon 5010 MIPS64 CPU on a custom board, have been > running it for years running various kernel versions. Linux-4.13 breaks for me, > and I bisected back to this change. > > What I see is user space bomb strait after boot with console messages like > this: > > mount[37] killed because of sig - 11 > > STACK DUMP: > <snip> > > I get a lot of them from various programs running from rc scripts. > It never manages to fully boot to login/shell. > > If I take the linux-4.12 arch/mips/include/asm/cmpxchg.h and drop that in > place on a linux-4.13 (or even linux-4.14-rc3) I can compile and run everything > successfully. > > Any thoughts? Are you running a uniprocessor/non-SMP kernel? Could you try this fix I submitted this fix 5 weeks ago: https://patchwork.linux-mips.org/patch/17226/ Ralf: Could we get that merged please? (Apologies if this email is formatted oddly.) Thanks, Paul
