# git rev-parse -q --verify d0cf9b561ca97d5245bb9e0c4774b7fadd897d67^{commit}
d0cf9b561ca97d5245bb9e0c4774b7fadd897d67
already have revision, skipping fetch
# git checkout -q -f -B kisskb d0cf9b561ca97d5245bb9e0c4774b7fadd897d67
# git clean -qxdf
# < git log -1
# commit d0cf9b561ca97d5245bb9e0c4774b7fadd897d67
# Author: Alistair Popple <alistair@popple.id.au>
# Date:   Tue Apr 17 19:11:28 2018 +1000
# 
#     powerpc/powernv/npu: Do a PID GPU TLB flush when invalidating a large address range
#     
#     The NPU has a limited number of address translation shootdown (ATSD)
#     registers and the GPU has limited bandwidth to process ATSDs. This can
#     result in contention of ATSD registers leading to soft lockups on some
#     threads, particularly when invalidating a large address range in
#     pnv_npu2_mn_invalidate_range().
#     
#     At some threshold it becomes more efficient to flush the entire GPU
#     TLB for the given MM context (PID) than individually flushing each
#     address in the range. This patch will result in ranges greater than
#     2MB being converted from 32+ ATSDs into a single ATSD which will flush
#     the TLB for the given PID on each GPU.
#     
#     Fixes: 1ab66d1fbada ("powerpc/powernv: Introduce address translation services for Nvlink2")
#     Cc: stable@vger.kernel.org # v4.12+
#     Signed-off-by: Alistair Popple <alistair@popple.id.au>
#     Acked-by: Balbir Singh <bsingharora@gmail.com>
#     Tested-by: Balbir Singh <bsingharora@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 d0cf9b561ca97d5245bb9e0c4774b7fadd897d67
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+POWERNV=n_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  pseries_defconfig
# Added to kconfig CONFIG_PPC_POWERNV=n
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+POWERNV=n_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+POWERNV=n_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount':
/kisskb/src/kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write':
/kisskb/src/drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec':
/kisskb/src/net/bridge/br_netlink.c:635:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/swap_state.c: In function '__add_to_swap_cache':
/kisskb/src/mm/swap_state.c:135:5: warning: 'error' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2041:9: warning: 'str' 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:340:21: note: 'pdeo' was declared here
/kisskb/src/drivers/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1822:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1732:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pseries_defconfig+POWERNV=n_powerpc
# Build took: 0:02:02.906447