# git rev-parse -q --verify 70b20dd7f897c6c14ab9e0d8400aed520ab5f09b^{commit}
70b20dd7f897c6c14ab9e0d8400aed520ab5f09b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 70b20dd7f897c6c14ab9e0d8400aed520ab5f09b
# git clean -qxdf
# < git log -1
# commit 70b20dd7f897c6c14ab9e0d8400aed520ab5f09b
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Aug 15 19:08:10 2018 -0700
# 
#     ALSA: update dell-wmi mic-mute registration to new world order
#     
#     Commit c647f806b8c2 ("ALSA: hda - Allow multiple ADCs for mic mute LED
#     controls") changed the return value of the snd_hda_gen_add_micmute_led()
#     without actually updating the callers.
#     
#     Admittedly, almost no callers actually cared about the return value.
#     But one call site very much did: the Dell wmi code.  It would see the
#     registration return zero, which _used_ to mean "failed" but now means
#     "success", and clear the dell_micmute_led_set_func pointer.
#     
#     End result: the successful registration would end up calling the Dell
#     code that thought it had all failed, and call through a NULL pointer.
#     
#     To make matters worse, it ends up being a tail-call, and with the
#     retpoline sequence you don't even see the caller (dell_micmute_update())
#     in the stack trace, so the error ended up way less obvious than it
#     should have been.
#     
#     Fixes: c647f806b8c2 "ALSA: hda - Allow multiple ADCs for mic mute LED controls"
#     Cc: Takashi Iwai <tiwai@suse.de>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-gcc --version
# < git log --format=%s --max-count=1 70b20dd7f897c6c14ab9e0d8400aed520ab5f09b
# < make -s -j 40 ARCH=mips O=/kisskb/build/linus_bigsur_defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  bigsur_defconfig
# make -s -j 40 ARCH=mips O=/kisskb/build/linus_bigsur_defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  
/kisskb/src/arch/mips/vdso/Makefile:38: MIPS VDSO requires binutils >= 2.25
/kisskb/src/arch/mips/vdso/Makefile:38: MIPS VDSO requires binutils >= 2.25
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:148:32: warning: 'levelspread[<Ua780>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:96:6: 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/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/net/bridge/br_netlink.c: In function 'br_afspec':
/kisskb/src/net/bridge/br_netlink.c:647:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/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]
lib/lib.a: could not read symbols: No more archived files
/kisskb/src/Makefile:1021: recipe for target 'vmlinux' failed
make[1]: *** [vmlinux] Error 1
Makefile:146: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -s -j 40 ARCH=mips O=/kisskb/build/linus_bigsur_defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_bigsur_defconfig_mips
# Build took: 0:00:25.017931