# git rev-parse -q --verify 82bc47f26969f6ed290cda529b9893941923c0f4^{commit}
82bc47f26969f6ed290cda529b9893941923c0f4
already have revision, skipping fetch
# git checkout -q -f -B kisskb 82bc47f26969f6ed290cda529b9893941923c0f4
# git clean -qxdf
# git log -1
commit 82bc47f26969f6ed290cda529b9893941923c0f4
Author: Nicholas Piggin <npiggin@gmail.com>
Date:   Wed Mar 7 11:37:18 2018 +1000

    powerpc/mm/slice: use the dynamic high slice size to limit bitmap operations
    
    The number of high slices a process might use now depends on its
    address space size, and what allocation address it has requested.
    
    This patch uses that limit throughout call chains where possible,
    rather than use the fixed SLICE_NUM_HIGH for bitmap operations.
    This saves some cost for processes that don't use very large address
    spaces.
    
    Perormance numbers aren't changed significantly, this may change
    with larger address spaces or different mmap access patterns that
    require more slice mask building.
    
    Signed-off-by: Nicholas Piggin <npiggin@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 82bc47f26969f6ed290cda529b9893941923c0f4
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_sequoia_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  44x/sequoia_defconfig
# make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_sequoia_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/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/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
INFO: Uncompressed kernel (size 0x483b9c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-4.16.0-rc4-g82bc47f
Created:      Wed Mar  7 15:23:53 2018
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2278534 Bytes = 2225.13 kB = 2.17 MB
Load Address: 00500000
Entry Point:  0050110c
Completed OK
# rm -rf /kisskb/build/powerpc-next_44x_sequoia_defconfig_powerpc
# Build took: 0:00:58.220237