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c3edc4010e
task_struct::signal and task_struct::sighand are pointers, which would normally make it
straightforward to not define those types in sched.h.
That is not so, because the types are accompanied by a myriad of APIs (macros and inline
functions) that dereference them.
Split the types and the APIs out of sched.h and move them into a new header, <linux/sched/signal.h>.
With this change sched.h does not know about 'struct signal' and 'struct sighand' anymore,
trying to put accessors into sched.h as a test fails the following way:
./include/linux/sched.h: In function ‘test_signal_types’:
./include/linux/sched.h:2461:18: error: dereferencing pointer to incomplete type ‘struct signal_struct’
^
This reduces the size and complexity of sched.h significantly.
Update all headers and .c code that relied on getting the signal handling
functionality from <linux/sched.h> to include <linux/sched/signal.h>.
The list of affected files in the preparatory patch was partly generated by
grepping for the APIs, and partly by doing coverage build testing, both
all[yes|mod|def|no]config builds on 64-bit and 32-bit x86, and an array of
cross-architecture builds.
Nevertheless some (trivial) build breakage is still expected related to rare
Kconfig combinations and in-flight patches to various kernel code, but most
of it should be handled by this patch.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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| .. | ||
| cpu | ||
| vsyscall | ||
| .gitignore | ||
| asm-offsets.c | ||
| crash_dump.c | ||
| debugtraps.S | ||
| disassemble.c | ||
| dma-nommu.c | ||
| dumpstack.c | ||
| dwarf.c | ||
| entry-common.S | ||
| ftrace.c | ||
| head_32.S | ||
| head_64.S | ||
| hw_breakpoint.c | ||
| idle.c | ||
| io_trapped.c | ||
| io.c | ||
| iomap.c | ||
| ioport.c | ||
| irq_32.c | ||
| irq_64.c | ||
| irq.c | ||
| kdebugfs.c | ||
| kgdb.c | ||
| kprobes.c | ||
| machine_kexec.c | ||
| machvec.c | ||
| Makefile | ||
| module.c | ||
| nmi_debug.c | ||
| perf_callchain.c | ||
| perf_event.c | ||
| process_32.c | ||
| process_64.c | ||
| process.c | ||
| ptrace_32.c | ||
| ptrace_64.c | ||
| ptrace.c | ||
| reboot.c | ||
| relocate_kernel.S | ||
| return_address.c | ||
| setup.c | ||
| sh_bios.c | ||
| sh_ksyms_32.c | ||
| sh_ksyms_64.c | ||
| signal_32.c | ||
| signal_64.c | ||
| smp.c | ||
| stacktrace.c | ||
| swsusp.c | ||
| sys_sh32.c | ||
| sys_sh.c | ||
| syscalls_32.S | ||
| syscalls_64.S | ||
| time.c | ||
| topology.c | ||
| traps_32.c | ||
| traps_64.c | ||
| traps.c | ||
| unwinder.c | ||
| vmlinux.lds.S | ||