4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit eef168789866514e5d4316f030131c9fe65b643f ]
It's better not to positively BUG_ON the kernel, however developers need a way to locate issues as soon as possible.
DBG_BUGON is introduced and it could only crash when EROFS_FS_DEBUG (EROFS developping feature) is on. It is helpful for developers to find and solve bugs quickly by eng builds.
Previously, DBG_BUGON is defined as ((void)0) if EROFS_FS_DEBUG is off, but some unused variable warnings as follows could occur:
drivers/staging/erofs/unzip_vle.c: In function `init_alway:': drivers/staging/erofs/unzip_vle.c:61:33: warning: unused variable `work' [-Wunused-variable] struct z_erofs_vle_work *const work = ^~~~
Fix it to #define DBG_BUGON(x) ((void)(x)).
Reviewed-by: Chao Yu yuchao0@huawei.com Signed-off-by: Gao Xiang gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/staging/erofs/internal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h index 57575c7f5635..048fb034b5aa 100644 --- a/drivers/staging/erofs/internal.h +++ b/drivers/staging/erofs/internal.h @@ -39,7 +39,7 @@ #define debugln(x, ...) ((void)0)
#define dbg_might_sleep() ((void)0) -#define DBG_BUGON(...) ((void)0) +#define DBG_BUGON(x) ((void)(x)) #endif
enum {