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authorRichard Weinberger <richard@nod.at>2018-06-15 16:42:56 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-11-27 16:10:46 +0100
commita134b05a43ae2327036e860fb10c74389b5bd971 (patch)
tree199d5b4c5e698f1a9be3dd5adf79d1b3c4d6e236
parentf2e71fed903fa6441188f4ac8b0df6528711cae3 (diff)
um: Give start_idle_thread() a return code
[ Upstream commit 7ff1e34bbdc15acab823b1ee4240e94623d50ee8 ] Fixes: arch/um/os-Linux/skas/process.c:613:1: warning: control reaches end of non-void function [-Wreturn-type] longjmp() never returns but gcc still warns that the end of the function can be reached. Add a return code and debug aid to detect this impossible case. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--arch/um/os-Linux/skas/process.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index c94c3bd70ccd..df4a985716eb 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -610,6 +610,11 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
fatal_sigsegv();
}
longjmp(*switch_buf, 1);
+
+ /* unreachable */
+ printk(UM_KERN_ERR "impossible long jump!");
+ fatal_sigsegv();
+ return 0;
}
void initial_thread_cb_skas(void (*proc)(void *), void *arg)