# git rev-parse -q --verify c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a^{commit}
c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
already have revision, skipping fetch
# git checkout -q -f -B kisskb c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
# git clean -qxdf
# < git log -1
# commit c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Jul 31 07:51:14 2020 +0200
# 
#     random32: move the pseudo-random 32-bit definitions to prandom.h
#     
#     The addition of percpu.h to the list of includes in random.h revealed
#     some circular dependencies on arm64 and possibly other platforms.  This
#     include was added solely for the pseudo-random definitions, which have
#     nothing to do with the rest of the definitions in this file but are
#     still there for legacy reasons.
#     
#     This patch moves the pseudo-random parts to linux/prandom.h and the
#     percpu.h include with it, which is now guarded by _LINUX_PRANDOM_H and
#     protected against recursive inclusion.
#     
#     A further cleanup step would be to remove this from <linux/random.h>
#     entirely, and make people who use the prandom infrastructure include
#     just the new header file.  That's a bit of a churn patch, but grepping
#     for "prandom_" and "next_pseudo_random32" "struct rnd_state" should
#     catch most users.
#     
#     But it turns out that that nice cleanup step is fairly painful, because
#     a _lot_ of code currently seems to depend on the implicit include of
#     <linux/random.h>, which can currently come in a lot of ways, including
#     such fairly core headfers as <linux/net.h>.
#     
#     So the "nice cleanup" part may or may never happen.
#     
#     Fixes: 1c9df907da83 ("random: fix circular include dependency on arm64 after addition of percpu.h")
#     Tested-by: Guenter Roeck <linux@roeck-us.net>
#     Acked-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 c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
# < 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:15,
                 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 22331 functions.
Completed OK
# rm -rf /kisskb/build/linus_ia64-defconfig_ia64-gcc4.9
# Build took: 0:02:17.497111