u-boot/include/asm-generic
Rasmus Villemoes 04a20ca5dc common/console.c: prevent pre-console buffer contents from being added to itself
I do not have any non-serial output devices, so a
print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL)
does nothing for me.

However, I was manually inspected the pre-console buffer using md.b,
and I noticed that the early part of it was repeated. The reason is
that the first call of print_pre_console_buffer(), from
console_init_f(), ends up invoking puts() with the contents of the
buffer at that point, and puts() at that point ends up in the else
branch of

	if (gd->flags & GD_FLG_DEVINIT) {
		/* Send to the standard output */
		fputs(stdout, s);
	} else {
		/* Send directly to the handler */
		pre_console_puts(s);
		serial_puts(s);
	}

so indeed the contents is added again.

That can be somewhat confusing (both when reading the buffer manually,
but also if it did actually come out on some device). So disable all
use of the pre-console buffer while print_pre_console_buffer() is
emitting it.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-08-31 12:16:01 -04:00
..
bitops include: Add generic bitops headers 2015-11-05 10:51:57 -05:00
atomic-long.h atomic-long: Fix warnings on arm64 2018-01-28 09:39:05 -05:00
atomic.h Add include/asm-generic/atomic.h 2018-09-25 21:49:18 -04:00
bitsperlong.h linux/bitops.h: GENMASK copy from linux 2015-10-21 09:14:07 -04:00
global_data.h common/console.c: prevent pre-console buffer contents from being added to itself 2022-08-31 12:16:01 -04:00
gpio.h gpio: Add gpio_request_by_line_name() 2022-04-08 15:17:23 -04:00
int-ll64.h arch: types.h: factor out fixed width typedefs to int-ll64.h 2018-09-10 20:48:16 -04:00
io.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
ioctl.h x86: Fix support for booting bzImage 2010-05-06 00:17:01 +02:00
pe.h efi_loader: add Linux magic to aarch64 crt0 2021-01-29 20:22:40 +01:00
sections.h Revert "efi_capsule: Move signature from DTB to .rodata" 2021-09-18 03:47:50 -06:00
signal.h asm-generic/signal.h: import from linux 2010-01-17 20:36:05 -05:00
types.h arch: types.h: factor out fixed width typedefs to int-ll64.h 2018-09-10 20:48:16 -04:00
u-boot.h common/board_r.c: drop legacy and unused bi_enetaddr 2022-06-06 18:01:21 -04:00
unaligned.h efi_loader: allow unaligned memory access 2018-06-03 15:27:21 +02:00