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460748d4ae
Parts of the Linux kernel build system struggle with _Noreturn. This
results in the following warnings when building on RHEL 8.5, and likely
other environments. Switch to using the __attribute__((noreturn)).
warning: objtool: dbuf_free_range()+0x2b8:
return with modified stack frame
warning: objtool: dbuf_free_range()+0x0:
stack state mismatch: cfa1=7+40 cfa2=7+8
...
WARNING: EXPORT symbol "arc_buf_size" [zfs.ko] version generation
failed, symbol will not be versioned.
WARNING: EXPORT symbol "spa_open" [zfs.ko] version generation
failed, symbol will not be versioned.
...
Additionally, __thread_exit() has been renamed spl_thread_exit() and
made a static inline function. This was needed because the kernel
will generate a warning for symbols which are __attribute__((noreturn))
and then exported with EXPORT_SYMBOL.
While we could continue to use _Noreturn in user space I've also
switched it to __attribute__((noreturn)) purely for consistency
throughout the code base.
Reviewed-by: Ryan Moeller <freqlabs@FreeBSD.org>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13238
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SPL_THREAD_H
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#define _SPL_THREAD_H
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/spinlock.h>
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#include <linux/kthread.h>
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#include <sys/types.h>
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#include <sys/sysmacros.h>
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#include <sys/tsd.h>
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/*
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* Thread interfaces
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*/
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#define TP_MAGIC 0x53535353
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#define TS_SLEEP TASK_INTERRUPTIBLE
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#define TS_RUN TASK_RUNNING
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#define TS_ZOMB EXIT_ZOMBIE
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#define TS_STOPPED TASK_STOPPED
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typedef void (*thread_func_t)(void *);
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#define thread_create_named(name, stk, stksize, func, arg, len, \
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pp, state, pri) \
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__thread_create(stk, stksize, (thread_func_t)func, \
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name, arg, len, pp, state, pri)
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#define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
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__thread_create(stk, stksize, (thread_func_t)func, #func, \
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arg, len, pp, state, pri)
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#define thread_exit() spl_thread_exit()
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#define thread_join(t) VERIFY(0)
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#define curthread current
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#define getcomm() current->comm
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#define getpid() current->pid
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extern kthread_t *__thread_create(caddr_t stk, size_t stksize,
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thread_func_t func, const char *name, void *args, size_t len, proc_t *pp,
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int state, pri_t pri);
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extern struct task_struct *spl_kthread_create(int (*func)(void *),
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void *data, const char namefmt[], ...);
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static inline __attribute__((noreturn)) void
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spl_thread_exit(void)
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{
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tsd_exit();
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SPL_KTHREAD_COMPLETE_AND_EXIT(NULL, 0);
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}
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extern proc_t p0;
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#ifdef HAVE_SIGINFO
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typedef kernel_siginfo_t spl_kernel_siginfo_t;
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#else
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typedef siginfo_t spl_kernel_siginfo_t;
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#endif
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#ifdef HAVE_SET_SPECIAL_STATE
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#define spl_set_special_state(x) set_special_state((x))
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#else
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#define spl_set_special_state(x) __set_current_state((x))
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#endif
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#endif /* _SPL_THREAD_H */
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