Hi,

On Fri, Jun 22, 2018 at 01:47:48PM -0600, Logan Gunthorpe wrote:

In order to provide non-atomic functions for io{read|write}64 that will
use readq and writeq when appropriate. We define a number of variants
of these functions in the generic iomap that will do non-atomic
operations on pio but atomic operations on mmio.

These functions are only defined if readq and writeq are defined. If
they are not, then the wrappers that always use non-atomic operations
from include/linux/io-64-nonatomic*.h will be used.

This patch causes a build failure in -next when building
ppc:corenet64_smp_defconfig.

In file included from drivers/crypto/caam/qi.c:14:0:
drivers/crypto/caam/regs.h: In function 'wr_reg64':
drivers/crypto/caam/regs.h:143:3:
	error: implicit declaration of function 'iowrite64'; did you mean 'iowrite32'?

Several files are afected; this is only the first error reported.

Bisect log is attached.

Guenter

---
# bad: [483d835c8189f0566a4cbbe47e74ffa314430e98] Add linux-next specific files for 20180713
# good: [1e4b044d22517cae7047c99038abb444423243ca] Linux 4.18-rc4
git bisect start 'HEAD' 'v4.18-rc4'
# good: [a5da8bf5df4436f40f4e28f0be51a4678830fe23] Merge remote-tracking branch 'crypto/master'
git bisect good a5da8bf5df4436f40f4e28f0be51a4678830fe23
# good: [34f19afdf1f94450c325da94559d07f746e9043d] Merge remote-tracking branch 'tip/auto-latest'
git bisect good 34f19afdf1f94450c325da94559d07f746e9043d
# good: [7aac4471307ac631685599b820616fd4c47edf29] Merge remote-tracking branch 'staging/staging-next'
git bisect good 7aac4471307ac631685599b820616fd4c47edf29
# good: [6b674574d58a738035fdf29008a308bee9235a16] Merge remote-tracking branch 'ntb/ntb-next'
git bisect good 6b674574d58a738035fdf29008a308bee9235a16
# bad: [013d0c6f50169c75eb37549f705604103cbeaa0b] module: allow symbol exports to be disabled
git bisect bad 013d0c6f50169c75eb37549f705604103cbeaa0b
# good: [205a106bac127145a4defae7d0d35945001fe924] kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN
git bisect good 205a106bac127145a4defae7d0d35945001fe924
# good: [89ce5b41242240e43de867b0469b71c6b8aa9d5f] mm, swap: fix race between swapoff and some swap operations
git bisect good 89ce5b41242240e43de867b0469b71c6b8aa9d5f
# good: [9760a955e6173bd0c2f58f1507fec8c88aaffc68] proc: fix BUILD_BUG_ON breakage on powerpc64-allyesconfig
git bisect good 9760a955e6173bd0c2f58f1507fec8c88aaffc68
# good: [696b14958b4d620ae7431351b667fd79397d550d] include/asm-generic/bug.h: clarify valid uses of WARN()
git bisect good 696b14958b4d620ae7431351b667fd79397d550d
# good: [e018a02ca17fbe4c34515bec58eceb8b0be94ec6] parisc: iomap: introduce io{read|write}64
git bisect good e018a02ca17fbe4c34515bec58eceb8b0be94ec6
# bad: [e18963b65c6397fdba51416ff70c33197f6c1a84] ntb: ntb_hw_intel: use io-64-nonatomic instead of in-driver hacks
git bisect bad e18963b65c6397fdba51416ff70c33197f6c1a84
# bad: [8f6432de3dbe1d1d222d2998380a495e04ba5fef] io-64-nonatomic: add io{read|write}64[be]{_lo_hi|_hi_lo} macros
git bisect bad 8f6432de3dbe1d1d222d2998380a495e04ba5fef
# bad: [d189c7f6b4a0dec224652af6d868eebb57553345] iomap: introduce io{read|write}64_{lo_hi|hi_lo}
git bisect bad d189c7f6b4a0dec224652af6d868eebb57553345
# first bad commit: [d189c7f6b4a0dec224652af6d868eebb57553345] iomap: introduce io{read|write}64_{lo_hi|hi_lo}