# git rev-parse -q --verify b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f^{commit}
b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f
already have revision, skipping fetch
# git checkout -q -f -B kisskb b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f
# git clean -qxdf
# < git log -1
# commit b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f
# Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
# Date:   Tue Sep 3 18:04:52 2019 +0530
# 
#     powerpc/nvdimm: use H_SCM_QUERY hcall on H_OVERLAP error
#     
#     Right now we force an unbind of SCM memory at drcindex on H_OVERLAP error.
#     This really slows down operations like kexec where we get the H_OVERLAP
#     error because we don't go through a full hypervisor re init.
#     
#     H_OVERLAP error for a H_SCM_BIND_MEM hcall indicates that SCM memory at
#     drc index is already bound. Since we don't specify a logical memory
#     address for bind hcall, we can use the H_SCM_QUERY hcall to query
#     the already bound logical address.
#     
#     Boot time difference with and without patch is:
#     
#     [    5.583617] IOMMU table initialized, virtual merging enabled
#     [    5.603041] papr_scm ibm,persistent-memory:ibm,pmemory@44104001: Retrying bind after unbinding
#     [  301.514221] papr_scm ibm,persistent-memory:ibm,pmemory@44108001: Retrying bind after unbinding
#     [  340.057238] hv-24x7: read 1530 catalog entries, created 537 event attrs (0 failures), 275 descs
#     
#     after fix
#     
#     [    5.101572] IOMMU table initialized, virtual merging enabled
#     [    5.116984] papr_scm ibm,persistent-memory:ibm,pmemory@44104001: Querying SCM details
#     [    5.117223] papr_scm ibm,persistent-memory:ibm,pmemory@44108001: Querying SCM details
#     [    5.120530] hv-24x7: read 1530 catalog entries, created 537 event attrs (0 failures), 275 descs
#     
#     Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20190903123452.28620-2-aneesh.kumar@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pseries_le_defconfig
# Added to kconfig CONFIG_NUMA=n
# yes \n | make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x31dc): Section mismatch in reference from the variable __boot_from_prom to the function .init.text:prom_init()
The function __boot_from_prom() references
the function __init prom_init().
This is often because __boot_from_prom lacks a __init 
annotation or the annotation of prom_init is wrong.

WARNING: vmlinux.o(.text+0x33c8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel()
The function start_here_common() references
the function __init start_kernel().
This is often because start_here_common lacks a __init 
annotation or the annotation of start_kernel is wrong.

Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_ppc64le-gcc5
# Build took: 0:03:06.476033