# git rev-parse -q --verify 50ad3f0d00248ed0dda6c8bb69e603b3e900161b^{commit}
50ad3f0d00248ed0dda6c8bb69e603b3e900161b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 50ad3f0d00248ed0dda6c8bb69e603b3e900161b
# git clean -qxdf
# < git log -1
# commit 50ad3f0d00248ed0dda6c8bb69e603b3e900161b
# Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
# Date:   Mon Jul 27 14:29:08 2020 +0530
# 
#     powerpc/book3s64/radix: Add kernel command line option to disable radix GTSE
#     
#     This adds a kernel command line option that can be used to disable GTSE support.
#     Disabling GTSE implies kernel will make hcalls to invalidate TLB entries.
#     
#     This was done so that we can do VM migration between configs that enable/disable
#     GTSE support via hypervisor. To migrate a VM from a system that supports
#     GTSE to a system that doesn't, we can boot the guest with
#     radix_hcall_invalidate=on, thereby forcing the guest to use hcalls for TLB
#     invalidates.
#     
#     The check for hcall availability is done in pSeries_setup_arch so that
#     the panic message appears on the console. This should only happen on
#     a hypervisor that doesn't force the guest to hash translation even
#     though it can't handle the radix GTSE=0 request via CAS. With
#     radix_hcall_invalidate=on if the hypervisor doesn't support hcall_rpt_invalidate
#     hcall it should force the LPAR to hash translation.
#     
#     Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Tested-by: Bharata B Rao <bharata@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200727085908.420806-1-aneesh.kumar@linux.ibm.com
# < /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 50ad3f0d00248ed0dda6c8bb69e603b3e900161b
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-next_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/powerpc-next_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/powerpc-next_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/powerpc-next_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 22248 functions.
Completed OK
# rm -rf /kisskb/build/powerpc-next_ia64-defconfig_ia64-gcc4.9
# Build took: 0:02:15.884660