sandbox: Correct loss of early output in SPL

At present fputc() is used before the console is available, then write()
is used. These are not compatible. Since fputc() buffers internally it is
better to use the write(), so that a partial line is immediately
displayed.

This has a slight effect on performance, but we are already using write()
for the vast majority of the output with no obvious impacts.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index d83c862182dd36e10e90a4a4f7fa440402c34650..5ea54179176c8e3d22722cbb0d71bcfb8403aa78 100644 (file)
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -644,7 +644,7 @@ int os_get_filesize(const char *fname, long long *size)
 
 void os_putc(int ch)
 {
-       fputc(ch, stdout);
+       os_write(1, &ch, 1);
 }
 
 void os_puts(const char *str)