# 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/sh4-linux/bin/sh4-linux-gcc --version
# < git log --format=%s --max-count=1 22db552b50fa11d8c1d171de908a1f9ef62172b7
# < make -s -j 48 ARCH=sh O=/kisskb/build/powerpc-fixes_sh-defconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  defconfig
# make -s -j 48 ARCH=sh O=/kisskb/build/powerpc-fixes_sh-defconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
  Generating include/generated/machtypes.h
<stdin>:1317:2: warning: #warning syscall pkey_mprotect not implemented [-Wcpp]
<stdin>:1320:2: warning: #warning syscall pkey_alloc not implemented [-Wcpp]
<stdin>:1323:2: warning: #warning syscall pkey_free not implemented [-Wcpp]
<stdin>:1326:2: warning: #warning syscall statx not implemented [-Wcpp]
<stdin>:1332:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp]
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp]
/kisskb/src/arch/sh/kernel/cpu/sh4/../sh3/../../entry-common.S: Assembler messages:
/kisskb/src/arch/sh/kernel/cpu/sh4/../sh3/../../entry-common.S:389: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
/kisskb/src/arch/sh/kernel/cpu/sh4/../sh3/../../entry-common.S:392: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
/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/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:146:32: warning: 'levelspread[<U2aa0>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:94:6: note: 'levelspread[<U2aa0>]' was declared here
/kisskb/src/mm/vmstat.c: In function 'sysctl_vm_numa_stat_handler':
/kisskb/src/mm/vmstat.c:89:5: warning: 'oldval' 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/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/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/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/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/ext4/readpage.c: In function 'ext4_mpage_readpages':
/kisskb/src/fs/ext4/readpage.c:294:1: warning: the frame size of 1200 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
/kisskb/src/fs/mpage.c: In function 'do_mpage_readpage':
/kisskb/src/fs/mpage.c:316:1: warning: the frame size of 1088 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/fs/mpage.c: In function '__mpage_writepage':
/kisskb/src/fs/mpage.c:676:1: warning: the frame size of 1152 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/drivers/sh/clk/cpg.c: In function 'r8':
/kisskb/src/drivers/sh/clk/cpg.c:41:2: warning: passing argument 1 of 'ioread8' discards 'const' qualifier from pointer target type [enabled by default]
/kisskb/src/include/asm-generic/iomap.h:29:21: note: expected 'void *' but argument is of type 'const void *'
/kisskb/src/drivers/sh/clk/cpg.c: In function 'r16':
/kisskb/src/drivers/sh/clk/cpg.c:46:2: warning: passing argument 1 of 'ioread16' discards 'const' qualifier from pointer target type [enabled by default]
/kisskb/src/include/asm-generic/iomap.h:30:21: note: expected 'void *' but argument is of type 'const void *'
/kisskb/src/drivers/sh/clk/cpg.c: In function 'r32':
/kisskb/src/drivers/sh/clk/cpg.c:51:2: warning: passing argument 1 of 'ioread32' discards 'const' qualifier from pointer target type [enabled by default]
/kisskb/src/include/asm-generic/iomap.h:32:21: note: expected 'void *' but argument is of type 'const void *'
  Kernel: arch/sh/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_sh-defconfig_sh4
# Build took: 0:00:45.270191