# git rev-parse -q --verify 942523fd67563ea677cc03fc97635893d4350749^{commit}
942523fd67563ea677cc03fc97635893d4350749
already have revision, skipping fetch
# git checkout -q -f -B kisskb 942523fd67563ea677cc03fc97635893d4350749
# git clean -qxdf
# < git log -1
# commit 942523fd67563ea677cc03fc97635893d4350749
# Author: Oliver O'Halloran <oohall@gmail.com>
# Date:   Wed Nov 13 20:40:35 2019 +1100
# 
#     powerpc/powernv: Disable native PCIe port management
#     
#     On PowerNV the PCIe topology is (currently) managed by the powernv
#     platform code in cooperation with firmware. The PCIe-native service
#     drivers bypass both and this can cause problems.
#     
#     Historically this hasn't been a big deal since the only port service
#     driver that saw much use was the AER driver. The AER driver relies on
#     a kernel service to report when errors occur rather than acting
#     autonomously so it's fairly easy to ignore. On PowerNV (and pseries)
#     AER events are handled through EEH, which ignores the AER service, so
#     it's never been an issue.
#     
#     Unfortunately, the hotplug port service driver (pciehp) does act
#     autonomously and conflicts with the platform specific hotplug
#     driver (pnv_php). The main issue is that pciehp claims the interrupt
#     associated with the PCIe capability which in turn prevents pnv_php
#     from claiming it.
#     
#     This results in hotplug events being handled by pciehp which does not
#     notify firmware when the PCIe topology changes, and does not
#     setup/teardown the arch specific PCI device structures (pci_dn) when
#     the topology changes. The end result is that hot-added devices cannot
#     be enabled and hot-removed devices may not be fully torn-down on
#     removal.
#     
#     We can fix these problems by setting the "pcie_ports_disabled" flag
#     during platform initialisation. The flag indicates the platform owns
#     the PCIe ports which stops the portbus driver from being registered.
#     
#     Fixes: 66725152fb9f ("PCI/hotplug: PowerPC PowerNV PCI hotplug driver")
#     Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191113094035.22394-1-oohall@gmail.com
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/ia64-linux/bin/ia64-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/ia64-linux/bin/ia64-linux-ld --version
# < git log --format=%s --max-count=1 942523fd67563ea677cc03fc97635893d4350749
# < make -s -j 80 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/ia64-linux/bin/ia64-linux-  defconfig
# make -s -j 80 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/ia64-linux/bin/ia64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here
/kisskb/src/fs/nfs/read.c: In function 'nfs_read_completion':
/kisskb/src/fs/nfs/read.c:196:5: warning: value computed is not used [-Wunused-value]
/kisskb/src/fs/nfs/read.c: In function 'nfs_readpage':
/kisskb/src/fs/nfs/read.c:352:2: warning: value computed is not used [-Wunused-value]
/kisskb/src/mm/vmstat.c: In function 'sysctl_vm_numa_stat_handler':
/kisskb/src/mm/vmstat.c:90:5: warning: 'oldval' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2076:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char':
/kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1497:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/core/devio.c: In function 'async_completed':
/kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized]
No errors detected in 21694 functions.
Completed OK
# rm -rf /kisskb/build/powerpc-next_ia64-defconfig_ia64
# Build took: 0:01:58.906895