# git rev-parse -q --verify fedb8da96355f5f64353625bf96dc69423ad1826^{commit}
fedb8da96355f5f64353625bf96dc69423ad1826
already have revision, skipping fetch
# git checkout -q -f -B kisskb fedb8da96355f5f64353625bf96dc69423ad1826
# git clean -qxdf
# < git log -1
# commit fedb8da96355f5f64353625bf96dc69423ad1826
# Author: John David Anglin <dave.anglin@bell.net>
# Date:   Sun Aug 5 13:30:31 2018 -0400
# 
#     parisc: Define mb() and add memory barriers to assembler unlock sequences
#     
#     For years I thought all parisc machines executed loads and stores in
#     order. However, Jeff Law recently indicated on gcc-patches that this is
#     not correct. There are various degrees of out-of-order execution all the
#     way back to the PA7xxx processor series (hit-under-miss). The PA8xxx
#     series has full out-of-order execution for both integer operations, and
#     loads and stores.
#     
#     This is described in the following article:
#     http://web.archive.org/web/20040214092531/http://www.cpus.hp.com/technical_references/advperf.shtml
#     
#     For this reason, we need to define mb() and to insert a memory barrier
#     before the store unlocking spinlocks. This ensures that all memory
#     accesses are complete prior to unlocking. The ldcw instruction performs
#     the same function on entry.
#     
#     Signed-off-by: John David Anglin <dave.anglin@bell.net>
#     Cc: stable@vger.kernel.org # 4.0+
#     Signed-off-by: Helge Deller <deller@gmx.de>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 fedb8da96355f5f64353625bf96dc69423ad1826
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_ppc64_defconfig+UP_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ppc64_defconfig
# Added to kconfig CONFIG_SMP=n
# make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_ppc64_defconfig+UP_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  olddefconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_ppc64_defconfig+UP_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:1256:20: warning: 'root' 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/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/net/bridge/br_netlink.c: In function 'br_afspec':
/kisskb/src/net/bridge/br_netlink.c:637:7: 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/drivers/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1835:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1745:46: warning: 'linear' 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:339:21: note: 'pdeo' was declared here
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2046:9: 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]
Completed OK
# rm -rf /kisskb/build/linus_ppc64_defconfig+UP_powerpc
# Build took: 0:01:02.308310