mirror of https://gitee.com/openkylin/linux.git
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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| .. | ||
| ARM-gcc.h | ||
| ChangeLog | ||
| Makefile | ||
| double_cpdo.c | ||
| entry.S | ||
| extended_cpdo.c | ||
| fpa11.c | ||
| fpa11.h | ||
| fpa11.inl | ||
| fpa11_cpdo.c | ||
| fpa11_cpdt.c | ||
| fpa11_cprt.c | ||
| fpmodule.c | ||
| fpmodule.h | ||
| fpmodule.inl | ||
| fpopcode.c | ||
| fpopcode.h | ||
| fpsr.h | ||
| milieu.h | ||
| single_cpdo.c | ||
| softfloat-macros | ||
| softfloat-specialize | ||
| softfloat.c | ||
| softfloat.h | ||