[U-Boot] [PATCH 11/22] spl: Add a comment to spl_set_bd()

There is a strange feature to set global_data to a data-section variable early in SPL. This only works if SPL actually has access to SRAM which is not the case on x86, for eaxmple. Add a comment to this effect.

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

common/spl/spl.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/common/spl/spl.c b/common/spl/spl.c index 0f64902b9b0..69e4aca8a58 100644 --- a/common/spl/spl.c +++ b/common/spl/spl.c @@ -375,6 +375,10 @@ static int spl_common_init(bool setup_malloc)

void spl_set_bd(void) { + /* + * NOTE: On some platforms (e.g. x86) bdata may be in flash and not + * writeable. + */ if (!gd->bd) gd->bd = &bdata; }