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| author |   Vincent Chen <vincent.chen@sifive.com> | 2019-09-23 08:45:15 +0800 |
|---|---|---|
| committer |   Paul Walmsley <paul.walmsley@sifive.com> | 2019-10-07 12:59:40 -0700 |
| commit | e0c0fc18f10d5080cddde0e81505fd3e952c20c4 (patch) | |
| tree | deb30fecb20f23a85088c3c8da3d026cbef63b88 /arch | |
| parent | riscv: avoid kernel hangs when trapped in BUG() (diff) | |
| download | linux-dev-e0c0fc18f10d5080cddde0e81505fd3e952c20c4.tar.xz linux-dev-e0c0fc18f10d5080cddde0e81505fd3e952c20c4.zip | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/kernel/traps.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index 055a937aca70..82f42a55451e 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -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: |