Hi Tom,

On 5/19/25 4:48 PM, Tom Rini wrote:
On Thu, May 15, 2025 at 05:55:44PM +0200, Lukasz Czechowski wrote:
Initialize the debug uart only in case CONFIG_DEBUG_UART is
enabled. The _debug_uart_putc is used internally by debug uart
functions, so it must be also included inside #ifdef block,
otherwise it will cause compilation warnings.

Signed-off-by: Lukasz Czechowski <lukasz.czechow...@thaumatec.com>
---
  lib/efi/efi_stub.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/lib/efi/efi_stub.c b/lib/efi/efi_stub.c
index 40fc29d9adf7..5172cd78a7c0 100644
--- a/lib/efi/efi_stub.c
+++ b/lib/efi/efi_stub.c
@@ -83,12 +83,14 @@ void puts(const char *str)
                putc(*str++);
  }
+#ifdef CONFIG_DEBUG_UART
  static void _debug_uart_putc(int ch)
  {
        putc(ch);
  }
DEBUG_UART_FUNCS
+#endif
void *memcpy(void *dest, const void *src, size_t size)
  {

I notice that this, and the uniphier implementations are the only
non-inline ones. Is the problem we later conflict with your changes,
perhaps because this wasn't marked inline? Thanks.


https://lore.kernel.org/u-boot/d63d53bd-3f63-430d-b0bc-2379b7bde...@rock-chips.com/

so essentially

lib/efi/efi_stub.c:86:13: error: '_debug_uart_putc' defined but not
used [-Werror=unused-function]
   86 | static void _debug_uart_putc(int ch)

I tested by adding inline and indeed it fixes the warning.

Somehow the non-inlined _debug_uart_init doesn't seem to be triggering any warning though.

Would you recommend to inline the _debug_uart_putc function instead of guarding the whole thing with ifdefery?

Cheers,
Quentin

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