for-linus-20191003
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCXZZKNgAKCRCRxhvAZXjc otfIAPsHUZn+Wfa/8uftNDJ6RLDXDsq6l8xiQTkz+k4YdnDj2AD/aIPjrM950jrS W7+8R7CSSQOLmIif6R+S0A1fyFoVlQA= =HVz0 -----END PGP SIGNATURE----- Merge tag 'for-linus-20191003' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux Pull clone3/pidfd fixes from Christian Brauner: "This contains a couple of fixes: - Fix pidfd selftest compilation (Shuah Kahn) Due to a false linking instruction in the Makefile compilation for the pidfd selftests would fail on some systems. - Fix compilation for glibc on RISC-V systems (Seth Forshee) In some scenarios linux/uapi/linux/sched.h is included where __ASSEMBLY__ is defined causing a build failure because struct clone_args was not guarded by an #ifndef __ASSEMBLY__. - Add missing clone3() and struct clone_args kernel-doc (Christian Brauner) clone3() and struct clone_args were missing kernel-docs. (The goal is to use kernel-doc for any function or type where it's worth it.) For struct clone_args this also contains a comment about the fact that it's versioned by size" * tag 'for-linus-20191003' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: sched: add kernel-doc for struct clone_args fork: add kernel-doc for clone3 selftests: pidfd: Fix undefined reference to pthread_create() sched: Add __ASSEMBLY__ guards around struct clone_argsalistair/sunxi64-5.4-dsi
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af0622f6ae
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@ -33,8 +33,31 @@
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#define CLONE_NEWNET 0x40000000 /* New network namespace */
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#define CLONE_NEWNET 0x40000000 /* New network namespace */
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#define CLONE_IO 0x80000000 /* Clone io context */
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#define CLONE_IO 0x80000000 /* Clone io context */
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/*
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#ifndef __ASSEMBLY__
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* Arguments for the clone3 syscall
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/**
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* struct clone_args - arguments for the clone3 syscall
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* @flags: Flags for the new process as listed above.
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* All flags are valid except for CSIGNAL and
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* CLONE_DETACHED.
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* @pidfd: If CLONE_PIDFD is set, a pidfd will be
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* returned in this argument.
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* @child_tid: If CLONE_CHILD_SETTID is set, the TID of the
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* child process will be returned in the child's
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* memory.
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* @parent_tid: If CLONE_PARENT_SETTID is set, the TID of
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* the child process will be returned in the
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* parent's memory.
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* @exit_signal: The exit_signal the parent process will be
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* sent when the child exits.
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* @stack: Specify the location of the stack for the
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* child process.
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* @stack_size: The size of the stack for the child process.
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* @tls: If CLONE_SETTLS is set, the tls descriptor
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* is set to tls.
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*
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* The structure is versioned by size and thus extensible.
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* New struct members must go at the end of the struct and
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* must be properly 64bit aligned.
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*/
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*/
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struct clone_args {
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struct clone_args {
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__aligned_u64 flags;
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__aligned_u64 flags;
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@ -46,6 +69,7 @@ struct clone_args {
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__aligned_u64 stack_size;
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__aligned_u64 stack_size;
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__aligned_u64 tls;
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__aligned_u64 tls;
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};
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};
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#endif
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/*
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/*
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* Scheduling policies
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* Scheduling policies
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@ -2604,6 +2604,17 @@ static bool clone3_args_valid(const struct kernel_clone_args *kargs)
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return true;
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return true;
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}
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}
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/**
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* clone3 - create a new process with specific properties
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* @uargs: argument structure
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* @size: size of @uargs
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*
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* clone3() is the extensible successor to clone()/clone2().
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* It takes a struct as argument that is versioned by its size.
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*
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* Return: On success, a positive PID for the child process.
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* On error, a negative errno number.
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*/
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SYSCALL_DEFINE2(clone3, struct clone_args __user *, uargs, size_t, size)
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SYSCALL_DEFINE2(clone3, struct clone_args __user *, uargs, size_t, size)
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{
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{
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int err;
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int err;
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@ -1,5 +1,5 @@
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# SPDX-License-Identifier: GPL-2.0-only
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# SPDX-License-Identifier: GPL-2.0-only
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CFLAGS += -g -I../../../../usr/include/ -lpthread
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CFLAGS += -g -I../../../../usr/include/ -pthread
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TEST_GEN_PROGS := pidfd_test pidfd_open_test pidfd_poll_test pidfd_wait
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TEST_GEN_PROGS := pidfd_test pidfd_open_test pidfd_poll_test pidfd_wait
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