# git rev-parse -q --verify d497ebf5fb3a026c0817f8c96cde578787f24093^{commit}
d497ebf5fb3a026c0817f8c96cde578787f24093
already have revision, skipping fetch
# git checkout -q -f -B kisskb d497ebf5fb3a026c0817f8c96cde578787f24093
# git clean -qxdf
# < git log -1
# commit d497ebf5fb3a026c0817f8c96cde578787f24093
# Author: Frederic Barrat <fbarrat@linux.ibm.com>
# Date:   Mon Jun 18 14:14:36 2018 +0200
# 
#     ocxl: Fix page fault handler in case of fault on dying process
#     
#     If a process exits without doing proper cleanup, there's a window
#     where an opencapi device can try to access the memory of the dying
#     process and may trigger a page fault. That's an expected scenario and
#     the ocxl driver holds a reference on the mm_struct of the process
#     until the opencapi device is notified of the process exiting.
#     However, if mm_users is already at 0, i.e. the address space of the
#     process has already been destroyed, the driver shouldn't try resolving
#     the page fault, as it will fail, but it can also try accessing already
#     freed data.
#     
#     It is fixed by only calling the bottom half of the page fault handler
#     if mm_users is greater than 0 and get a reference on mm_users instead
#     of mm_count. Otherwise, we can safely return a translation fault to
#     the device, as its associated memory context is being removed. The
#     opencapi device will be properly cleaned up shortly after when closing
#     the file descriptors.
#     
#     Fixes: 5ef3166e8a32 ("ocxl: Driver code for 'generic' opencapi devices")
#     Cc: stable@vger.kernel.org # v4.16+
#     Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
#     Reviewed-By: Alastair D'Silva <alastair@d-silva.org>
#     Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.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 d497ebf5fb3a026c0817f8c96cde578787f24093
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_wii_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  wii_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_wii_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/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/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:127:33: warning: 'levelspread[<U95a0>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:94:6: note: 'levelspread[<U95a0>]' was declared here
/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/net/wireless/broadcom/b43/phy_n.c: In function 'b43_nphy_rf_ctl_override_rev7':
/kisskb/src/drivers/net/wireless/broadcom/b43/phy_n.c:202:21: warning: 'val_addr' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_rx_mgmt_beacon':
/kisskb/src/net/mac80211/mlme.c:1353:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c:1310:6: note: 'pwr_level_cisco' was declared here
INFO: Uncompressed kernel (size 0x88a628) overlaps the address of the wrapper(0x600000)
INFO: Fixing the link_address of wrapper to (0x900000)
Completed OK
# rm -rf /kisskb/build/powerpc-next_wii_defconfig_powerpc
# Build took: 0:00:56.942696