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riscv: avoid sending a SIGTRAP to a user thread trapped in WARN() 

On RISC-V, when the kernel runs code on behalf of a user thread, and the
kernel executes a WARN() or WARN_ON(), the user thread will be sent
a bogus SIGTRAP.  Fix the RISC-V kernel code to not send a SIGTRAP when
a WARN()/WARN_ON() is executed.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
[paul.walmsley@sifive.com: fixed subject]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
This commit is contained in:
Vincent Chen 2019-09-23 08:45:15 +08:00 committed by Paul Walmsley
parent 8b04825ed2
commit e0c0fc18f1
1 changed files with 1 additions and 1 deletions
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2
arch/riscv/kernel/traps.c
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@ -134,7 +134,7 @@ asmlinkage void do_trap_break(struct pt_regs *regs)
break;
case BUG_TRAP_TYPE_WARN:
regs->sepc += get_break_insn_length(regs->sepc);
break;
return;
case BUG_TRAP_TYPE_BUG:
#endif /* CONFIG_GENERIC_BUG */
default: