# git rev-parse -q --verify 22db552b50fa11d8c1d171de908a1f9ef62172b7^{commit}
22db552b50fa11d8c1d171de908a1f9ef62172b7
already have revision, skipping fetch
# git checkout -q -f -B kisskb 22db552b50fa11d8c1d171de908a1f9ef62172b7
# git clean -qxdf
# < git log -1
# commit 22db552b50fa11d8c1d171de908a1f9ef62172b7
# Author: Arnd Bergmann <arnd@arndb.de>
# Date:   Tue Jun 19 16:02:27 2018 +0200
# 
#     powerpc/powermac: Fix rtc read/write functions
#     
#     As Mathieu pointed out, my conversion to time64_t was incorrect and
#     resulted in negative times to be read from the RTC. The problem is
#     that during the conversion from a byte array to a time64_t, the
#     'unsigned char' variable holding the top byte gets turned into a
#     negative signed 32-bit integer before being assigned to the 64-bit
#     variable for any times after 1972.
#     
#     This changes the logic to cast to an unsigned 32-bit number first for
#     the Macintosh time and then convert that to the Unix time, which then
#     gives us a time in the documented 1904..2040 year range. I decided not
#     to use the longer 1970..2106 range that other drivers use, for
#     consistency with the literal interpretation of the register, but that
#     could be easily changed if we decide we want to support any Mac after
#     2040.
#     
#     Just to be on the safe side, I'm also adding a WARN_ON that will
#     trigger if either the year 2040 has come and is observed by this
#     driver, or we run into an RTC that got set back to a pre-1970 date for
#     some reason (the two are indistinguishable).
#     
#     For the RTC write functions, Andreas found another problem: both
#     pmu_request() and cuda_request() are varargs functions, so changing
#     the type of the arguments passed into them from 32 bit to 64 bit
#     breaks the API for the set_rtc_time functions. This changes it back to
#     32 bits.
#     
#     The same code exists in arch/m68k/ and is patched in an identical way
#     now in a separate patch.
#     
#     Fixes: 5bfd643583b2 ("powerpc: use time64_t in read_persistent_clock")
#     Reported-by: Mathieu Malaterre <malat@debian.org>
#     Reported-by: Andreas Schwab <schwab@linux-m68k.org>
#     Signed-off-by: Arnd Bergmann <arnd@arndb.de>
#     Tested-by: Mathieu Malaterre <malat@debian.org>
#     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 22db552b50fa11d8c1d171de908a1f9ef62172b7
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_ge_imp3a_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  85xx/ge_imp3a_defconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_ge_imp3a_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:146:32: warning: 'levelspread[<Ua780>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:94:6: note: 'levelspread[<Ua780>]' was declared here
/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/Makefile:24: CC cannot link executables. Skipping bpfilter.
/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/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/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/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/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/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]
INFO: Uncompressed kernel (size 0x80be78) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x900000)
Image Name:   Linux-4.18.0-rc1-g22db552
Created:      Wed Jun 27 23:19:10 2018
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    4115969 Bytes = 4019.50 kB = 3.93 MB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_85xx_ge_imp3a_defconfig_powerpc
# Build took: 0:00:22.505246