If serial support is not compiled into U-Boot, which may be the case for some SPL builds, the following warning will be generated in disk.c:
cmd/disk.c: In function 'common_diskboot': cmd/disk.c:16:6: warning: variable 'dev' set but not used [-Wunused-but-set-variable] int dev, part; ^ The warning is a result of printf() calls being optimized away, and thus the whole dev variable becomes indeed unused. Mark the variable as __maybe_unused .
Signed-off-by: Marek Vasut marex@denx.de Cc: Simon Glass sjg@chromium.org Cc: Tom Rini trini@konsulko.com --- cmd/disk.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/cmd/disk.c b/cmd/disk.c index 2fd1717..4c88554 100644 --- a/cmd/disk.c +++ b/cmd/disk.c @@ -13,7 +13,8 @@ int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc, char *const argv[]) { - int dev, part; + __maybe_unused int dev; + int part; ulong addr = CONFIG_SYS_LOAD_ADDR; ulong cnt; disk_partition_t info;