# git rev-parse -q --verify 642e7fd23353e22290e3d51719fcb658dc252342^{commit}
642e7fd23353e22290e3d51719fcb658dc252342
already have revision, skipping fetch
# git checkout -q -f -B kisskb 642e7fd23353e22290e3d51719fcb658dc252342
# git clean -qxdf
# < git log -1
# commit 642e7fd23353e22290e3d51719fcb658dc252342
# Merge: 2103596 c9a2119
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Apr 2 21:22:12 2018 -0700
# 
#     Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux
#     
#     Pull removal of in-kernel calls to syscalls from Dominik Brodowski:
#      "System calls are interaction points between userspace and the kernel.
#       Therefore, system call functions such as sys_xyzzy() or
#       compat_sys_xyzzy() should only be called from userspace via the
#       syscall table, but not from elsewhere in the kernel.
#     
#       At least on 64-bit x86, it will likely be a hard requirement from
#       v4.17 onwards to not call system call functions in the kernel: It is
#       better to use use a different calling convention for system calls
#       there, where struct pt_regs is decoded on-the-fly in a syscall wrapper
#       which then hands processing over to the actual syscall function. This
#       means that only those parameters which are actually needed for a
#       specific syscall are passed on during syscall entry, instead of
#       filling in six CPU registers with random user space content all the
#       time (which may cause serious trouble down the call chain). Those
#       x86-specific patches will be pushed through the x86 tree in the near
#       future.
#     
#       Moreover, rules on how data may be accessed may differ between kernel
#       data and user data. This is another reason why calling sys_xyzzy() is
#       generally a bad idea, and -- at most -- acceptable in arch-specific
#       code.
#     
#       This patchset removes all in-kernel calls to syscall functions in the
#       kernel with the exception of arch/. On top of this, it cleans up the
#       three places where many syscalls are referenced or prototyped, namely
#       kernel/sys_ni.c, include/linux/syscalls.h and include/linux/compat.h"
#     
#     * 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux: (109 commits)
#       bpf: whitelist all syscalls for error injection
#       kernel/sys_ni: remove {sys_,sys_compat} from cond_syscall definitions
#       kernel/sys_ni: sort cond_syscall() entries
#       syscalls/x86: auto-create compat_sys_*() prototypes
#       syscalls: sort syscall prototypes in include/linux/compat.h
#       net: remove compat_sys_*() prototypes from net/compat.h
#       syscalls: sort syscall prototypes in include/linux/syscalls.h
#       kexec: move sys_kexec_load() prototype to syscalls.h
#       x86/sigreturn: use SYSCALL_DEFINE0
#       x86: fix sys_sigreturn() return type to be long, not unsigned long
#       x86/ioport: add ksys_ioperm() helper; remove in-kernel calls to sys_ioperm()
#       mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead()
#       mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff()
#       mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64()
#       fs: add ksys_fallocate() wrapper; remove in-kernel calls to sys_fallocate()
#       fs: add ksys_p{read,write}64() helpers; remove in-kernel calls to syscalls
#       fs: add ksys_truncate() wrapper; remove in-kernel calls to sys_truncate()
#       fs: add ksys_sync_file_range helper(); remove in-kernel calls to syscall
#       kernel: add ksys_setsid() helper; remove in-kernel call to sys_setsid()
#       kernel: add ksys_unshare() helper; remove in-kernel calls to sys_unshare()
#       ...
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux-gcc --version
# < git log --format=%s --max-count=1 642e7fd23353e22290e3d51719fcb658dc252342
# < make -s -j 10 ARCH=i386 O=/kisskb/build/linus_i386-randconfig_i386 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux-  randconfig
KCONFIG_SEED=0xB87AD120
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# yes \n | make -s -j 10 ARCH=i386 O=/kisskb/build/linus_i386-randconfig_i386 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -s -j 10 ARCH=i386 O=/kisskb/build/linus_i386-randconfig_i386 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux-  
/kisskb/src/ipc/shm.c: In function 'ksys_shmdt':
/kisskb/src/ipc/shm.c:1592:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/x86/kernel/e820.c: In function 'e820__setup_pci_gap':
/kisskb/src/arch/x86/kernel/e820.c:652:2: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/x86/kernel/hw_breakpoint.c: In function 'arch_validate_hwbkpt_settings':
/kisskb/src/arch/x86/kernel/hw_breakpoint.c:361:20: warning: 'align' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/x86/kernel/apic/io_apic.c: In function 'mp_map_pin_to_irq':
/kisskb/src/arch/x86/kernel/apic/io_apic.c:1033:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/memcontrol.c: In function 'mem_cgroup_commit_charge':
/kisskb/src/mm/memcontrol.c:2077:5: warning: 'isolated' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/memcontrol.c:2091:6: note: 'isolated' was declared here
/kisskb/src/block/bfq-iosched.c: In function 'bfq_exit_icq_bfqq':
/kisskb/src/block/bfq-iosched.c:4064:11: warning: 'bfqd' 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/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_fence':
/kisskb/src/drivers/dma-buf/reservation.c:210:7: warning: 'k' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/dma-buf/reservation.c:160:17: note: 'k' was declared here
/kisskb/src/kernel/time/tick-sched.c: In function 'tick_nohz_idle_exit':
/kisskb/src/kernel/time/tick-sched.c:628:17: warning: 'now' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/time/tick-sched.c:1035:10: note: 'now' was declared here
/kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_sideband_msg_build':
/kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:364:23: warning: 'hdrlen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/rhashtable.c: In function 'rht_deferred_worker':
/kisskb/src/lib/rhashtable.c:269:2: warning: 'next' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/rhashtable.c:234:28: note: 'next' was declared here
/kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl':
/kisskb/src/lib/mpi/mpicoder.c:352:8: warning: 'buff' 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:157:15: warning: 'c' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/media/dvb-core/dvb_frontend.c: In function 'dvb_frontend_handle_ioctl':
/kisskb/src/drivers/media/dvb-core/dvb_frontend.c:2635:1: warning: the frame size of 1064 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/drivers/mtd/ubi/eba.c: In function 'try_write_vid_and_data':
/kisskb/src/drivers/mtd/ubi/eba.c:898:7: warning: 'opnum' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/dwc3/debugfs.c: In function 'dwc3_endpoint_open':
/kisskb/src/drivers/usb/dwc3/debugfs.c:698:20: warning: 'f_map' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/video/backlight/adp8860_bl.c: In function 'adp8860_bl_ambient_light_level_show':
/kisskb/src/drivers/video/backlight/adp8860_bl.c:579:10: warning: 'ret_val' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/serial/cp210x.c: In function 'cp210x_tx_empty':
/kisskb/src/drivers/usb/serial/cp210x.c:867:2: warning: 'count' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/serial/f81534.c: In function 'f81534_set_register':
/kisskb/src/drivers/usb/serial/f81534.c:244:10: warning: 'status' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/serial/f81534.c: In function 'f81534_get_register':
/kisskb/src/drivers/usb/serial/f81534.c:283:10: warning: 'status' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/linus_i386-randconfig_i386
# Build took: 0:01:42.631559