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authorJohan Hovold <johan@kernel.org>2020-11-23 11:23:13 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-12-04 15:49:48 +0100
commit62dcd9c59f324e484c1d655884e0101a988f6671 (patch)
treeec29b5f49759dbb05a35982c1de49d3fe037f405 /drivers/of
parentf35a07f92616700733636c06dd6e5b6cdc807fe4 (diff)
earlycon: simplify earlycon-table implementation
Instead of using the array-of-pointers trick to avoid having gcc mess up the earlycon array stride, specify type alignment when declaring entries to prevent gcc from increasing alignment. This is essentially an alternative (one-line) fix to the problem addressed by commit dd709e72cb93 ("earlycon: Use a pointer table to fix __earlycon_table stride"). gcc can increase the alignment of larger objects with static extent as an optimisation, but this can be suppressed by using the aligned attribute when declaring variables. Note that we have been relying on this behaviour for kernel parameters for 16 years and it indeed hasn't changed since the introduction of the aligned attribute in gcc-3.1. Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://lore.kernel.org/r/20201123102319.8090-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/fdt.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 4602e467ca8b..feb0f2d67fc5 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -906,7 +906,7 @@ int __init early_init_dt_scan_chosen_stdout(void)
int offset;
const char *p, *q, *options = NULL;
int l;
- const struct earlycon_id **p_match;
+ const struct earlycon_id *match;
const void *fdt = initial_boot_params;
offset = fdt_path_offset(fdt, "/chosen");
@@ -933,10 +933,7 @@ int __init early_init_dt_scan_chosen_stdout(void)
return 0;
}
- for (p_match = __earlycon_table; p_match < __earlycon_table_end;
- p_match++) {
- const struct earlycon_id *match = *p_match;
-
+ for (match = __earlycon_table; match < __earlycon_table_end; match++) {
if (!match->compatible[0])
continue;