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authorEric W. Biederman <ebiederm@xmission.com>2021-06-28 14:52:01 -0500
committerEric W. Biederman <ebiederm@xmission.com>2021-12-13 12:04:45 -0600
commit0e25498f8cd43c1b5aa327f373dd094e9a006da7 (patch)
treef9f4cf6d7c1deccaa34ad6f7af345bff52b63c12 /arch/nds32
parent5e354747b2c91f64544b97760d38e2d3280307b2 (diff)
downloadlinux-0e25498f8cd43c1b5aa327f373dd094e9a006da7.tar.bz2
exit: Add and use make_task_dead.
There are two big uses of do_exit. The first is it's design use to be the guts of the exit(2) system call. The second use is to terminate a task after something catastrophic has happened like a NULL pointer in kernel code. Add a function make_task_dead that is initialy exactly the same as do_exit to cover the cases where do_exit is called to handle catastrophic failure. In time this can probably be reduced to just a light wrapper around do_task_dead. For now keep it exactly the same so that there will be no behavioral differences introducing this new concept. Replace all of the uses of do_exit that use it for catastraphic task cleanup with make_task_dead to make it clear what the code is doing. As part of this rename rewind_stack_do_exit rewind_stack_and_make_dead. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/nds32')
-rw-r--r--arch/nds32/kernel/fpu.c2
-rw-r--r--arch/nds32/kernel/traps.c8
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/nds32/kernel/fpu.c b/arch/nds32/kernel/fpu.c
index 9edd7ed7d7bf..701c09a668de 100644
--- a/arch/nds32/kernel/fpu.c
+++ b/arch/nds32/kernel/fpu.c
@@ -223,7 +223,7 @@ inline void handle_fpu_exception(struct pt_regs *regs)
}
} else if (fpcsr & FPCSR_mskRIT) {
if (!user_mode(regs))
- do_exit(SIGILL);
+ make_task_dead(SIGILL);
si_signo = SIGILL;
}
diff --git a/arch/nds32/kernel/traps.c b/arch/nds32/kernel/traps.c
index ca75d475eda4..c0a8f3344fb9 100644
--- a/arch/nds32/kernel/traps.c
+++ b/arch/nds32/kernel/traps.c
@@ -141,7 +141,7 @@ void __noreturn die(const char *str, struct pt_regs *regs, int err)
bust_spinlocks(0);
spin_unlock_irq(&die_lock);
- do_exit(SIGSEGV);
+ make_task_dead(SIGSEGV);
}
EXPORT_SYMBOL(die);
@@ -240,7 +240,7 @@ void unhandled_interruption(struct pt_regs *regs)
pr_emerg("unhandled_interruption\n");
show_regs(regs);
if (!user_mode(regs))
- do_exit(SIGKILL);
+ make_task_dead(SIGKILL);
force_sig(SIGKILL);
}
@@ -251,7 +251,7 @@ void unhandled_exceptions(unsigned long entry, unsigned long addr,
addr, type);
show_regs(regs);
if (!user_mode(regs))
- do_exit(SIGKILL);
+ make_task_dead(SIGKILL);
force_sig(SIGKILL);
}
@@ -278,7 +278,7 @@ void do_revinsn(struct pt_regs *regs)
pr_emerg("Reserved Instruction\n");
show_regs(regs);
if (!user_mode(regs))
- do_exit(SIGILL);
+ make_task_dead(SIGILL);
force_sig(SIGILL);
}