On Tue, 17 Sep 2019 07:06:28 +0200 Greg KH greg@kroah.com wrote:
On Tue, Sep 17, 2019 at 02:09:43PM +1000, Michael Ellerman wrote:
Greg Kurz groug@kaod.org writes:
On Thu, 12 Sep 2019 07:30:49 +0000 Sasha Levin sashal@kernel.org wrote:
Hi,
[This is an automated email]
This commit has been processed because it contains a -stable tag. The stable tag indicates that it's relevant for the following trees: 4.12+
The bot has tested the following trees: v5.2.14, v4.19.72, v4.14.143.
v5.2.14: Build OK! v4.19.72: Failed to apply! Possible dependencies: 75d9fc7fd94e ("powerpc/powernv: move OPAL call wrapper tracing and interrupt handling to C")
This is the only dependency indeed.
But it's a large and intrusive change, so we don't want to backport it just for this.
v4.14.143: Failed to apply! Possible dependencies: 104daea149c4 ("kconfig: reference environment variables directly and remove 'option env='") 21c54b774744 ("kconfig: show compiler version text in the top comment") 315bab4e972d ("kbuild: fix endless syncconfig in case arch Makefile sets CROSS_COMPILE") 3298b690b21c ("kbuild: Add a cache for generated variables") 4e56207130ed ("kbuild: Cache a few more calls to the compiler") 75d9fc7fd94e ("powerpc/powernv: move OPAL call wrapper tracing and interrupt handling to C") 8f2133cc0e1f ("powerpc/pseries: hcall_exit tracepoint retval should be signed") 9a234a2e3843 ("kbuild: create directory for make cache only when necessary") d677a4d60193 ("Makefile: support flag -fsanitizer-coverage=trace-cmp") e08d6de4e532 ("kbuild: remove kbuild cache") e17c400ae194 ("kbuild: shrink .cache.mk when it exceeds 1000 lines") e501ce957a78 ("x86: Force asm-goto") e9666d10a567 ("jump_label: move 'asm goto' support test to Kconfig")
That's quite a lot of patches to workaround a hard to hit skiboot bug. As an alternative, the patch can be backported so that it applies the following change:
-OPAL_CALL(opal_xive_allocate_irq, OPAL_XIVE_ALLOCATE_IRQ); +OPAL_CALL(opal_xive_allocate_irq_raw, OPAL_XIVE_ALLOCATE_IRQ);
to "arch/powerpc/platforms/powernv/opal-wrappers.S" instead of "arch/powerpc/platforms/powernv/opal-call.c" .
BTW, this could also be done for 4.19.y .
NOTE: The patch will not be queued to stable trees until it is upstream.
How should we proceed with this patch?
Michael ?
We should do a manual backport for v4.14 and v4.19. Greg do you have cycles to do that?
Me? No, sorry. If you want this fix there, I need someone to send the backport.
Heh I guess Michael was asking me :) I'll send the backport.
Cheers,
-- Greg
thanks,
greg k-h