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acpi/acpigen.c: Be explicit about char sign 

The sign of 'char' is not standardized and with GCC is architecture
dependent.

This fixes warnings when compiling this file on arm64.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I53b99835b2ffec5d752fc531fd59e4715f61aced
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76006
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Arthur Heymans 2023-06-22 20:39:31 +02:00 committed by Felix Held
parent fe242cea1e
commit 62ea7a8165
1 changed files with 1 additions and 1 deletions
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src/acpi/acpigen.c
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@ -187,7 +187,7 @@ void acpigen_write_name_unicode(const char *name, const char *string)
acpigen_write_len_f(); acpigen_write_len_f();
acpigen_write_integer(len); acpigen_write_integer(len);
for (size_t i = 0; i < len; i++) { for (size_t i = 0; i < len; i++) {
const char c = string[i]; const signed char c = string[i];
/* Simple ASCII to UTF-16 conversion, replace non ASCII characters */ /* Simple ASCII to UTF-16 conversion, replace non ASCII characters */
acpigen_emit_word(c >= 0 ? c : '?'); acpigen_emit_word(c >= 0 ? c : '?');
} }