# 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-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 22db552b50fa11d8c1d171de908a1f9ef62172b7
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# yes \n | make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
/kisskb/src/sound/aoa/codecs/onyx.c: In function 'onyx_snd_single_bit_get':
/kisskb/src/sound/aoa/codecs/onyx.c:380:37: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  ucontrol->value.integer.value[0] = !!(c & mask) ^ polarity;
                                     ^
In file included from /kisskb/src/include/linux/io.h:25:0,
                 from /kisskb/src/include/linux/of_address.h:7,
                 from /kisskb/src/drivers/ata/ahci_qoriq.c:18:
/kisskb/src/drivers/ata/ahci_qoriq.c: In function 'ahci_qoriq_hardreset':
/kisskb/src/arch/powerpc/include/asm/io.h:633:3: warning: 'px_is' may be used uninitialized in this function [-Wmaybe-uninitialized]
   ppc_pci_io.name al;    \
   ^
/kisskb/src/drivers/ata/ahci_qoriq.c:86:14: note: 'px_is' was declared here
  u32 px_cmd, px_is, px_val;
              ^
In file included from /kisskb/src/include/linux/io.h:25:0,
                 from /kisskb/src/include/linux/of_address.h:7,
                 from /kisskb/src/drivers/ata/ahci_qoriq.c:18:
/kisskb/src/arch/powerpc/include/asm/io.h:142:2: warning: 'px_cmd' may be used uninitialized in this function [-Wmaybe-uninitialized]
  __asm__ __volatile__("sync;"#insn" %1,%y0"   \
  ^
/kisskb/src/drivers/ata/ahci_qoriq.c:86:6: note: 'px_cmd' was declared here
  u32 px_cmd, px_is, px_val;
      ^
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc-5.3
# Build took: 0:04:18.853962