# git rev-parse -q --verify 1c9df907da83812e4f33b59d3d142c864d9da57f^{commit}
1c9df907da83812e4f33b59d3d142c864d9da57f
already have revision, skipping fetch
# git checkout -q -f -B kisskb 1c9df907da83812e4f33b59d3d142c864d9da57f
# git clean -qxdf
# < git log -1
# commit 1c9df907da83812e4f33b59d3d142c864d9da57f
# Author: Willy Tarreau <w@1wt.eu>
# Date:   Thu Jul 30 07:59:24 2020 +0200
# 
#     random: fix circular include dependency on arm64 after addition of percpu.h
#     
#     Daniel Díaz and Kees Cook independently reported that commit
#     f227e3ec3b5c ("random32: update the net random state on interrupt and
#     activity") broke arm64 due to a circular dependency on include files
#     since the addition of percpu.h in random.h.
#     
#     The correct fix would definitely be to move all the prandom32 stuff out
#     of random.h but for backporting, a smaller solution is preferred.
#     
#     This one replaces linux/percpu.h with asm/percpu.h, and this fixes the
#     problem on x86_64, arm64, arm, and mips.  Note that moving percpu.h
#     around didn't change anything and that removing it entirely broke
#     differently.  When backporting, such options might still be considered
#     if this patch fails to help.
#     
#     [ It turns out that an alternate fix seems to be to just remove the
#       troublesome <asm/pointer_auth.h> remove from the arm64 <asm/smp.h>
#       that causes the circular dependency.
#     
#       But we might as well do the whole belt-and-suspenders thing, and
#       minimize inclusion in <linux/random.h> too. Either will fix the
#       problem, and both are good changes.   - Linus ]
#     
#     Reported-by: Daniel Díaz <daniel.diaz@linaro.org>
#     Reported-by: Kees Cook <keescook@chromium.org>
#     Tested-by: Marc Zyngier <maz@kernel.org>
#     Fixes: f227e3ec3b5c
#     Cc: Stephen Rothwell <sfr@canb.auug.org.au>
#     Signed-off-by: Willy Tarreau <w@1wt.eu>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-ld --version
# < git log --format=%s --max-count=1 1c9df907da83812e4f33b59d3d142c864d9da57f
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  defconfig
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  help
# make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  olddefconfig
# make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/arch/ia64/include/uapi/asm/intrinsics.h:22:0,
                 from /kisskb/src/arch/ia64/include/asm/intrinsics.h:11,
                 from /kisskb/src/arch/ia64/include/asm/bitops.h:19,
                 from /kisskb/src/include/linux/bitops.h:29,
                 from /kisskb/src/include/linux/kernel.h:12,
                 from /kisskb/src/include/linux/list.h:9,
                 from /kisskb/src/include/linux/preempt.h:11,
                 from /kisskb/src/include/linux/spinlock.h:51,
                 from /kisskb/src/include/linux/seqlock.h:36,
                 from /kisskb/src/include/linux/time.h:6,
                 from /kisskb/src/fs/nfs/read.c:11:
/kisskb/src/fs/nfs/read.c: In function 'nfs_read_completion':
/kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value]
 ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
  ^
/kisskb/src/fs/nfs/read.c:196:5: note: in expansion of macro 'xchg'
     xchg(&nfs_req_openctx(req)->error, error);
     ^
/kisskb/src/fs/nfs/read.c: In function 'nfs_readpage':
/kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value]
 ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
  ^
/kisskb/src/fs/nfs/read.c:355:2: note: in expansion of macro 'xchg'
  xchg(&ctx->error, 0);
  ^
No errors detected in 22247 functions.
Completed OK
# rm -rf /kisskb/build/linus_ia64-defconfig_ia64-gcc4.9
# Build took: 0:02:16.273427