From 66a5c40f60f5d88ad8d47ba6a4ba05892853fa1f Mon Sep 17 00:00:00 2001 From: Tanzir Hasan Date: Tue, 26 Dec 2023 18:00:00 +0000 Subject: kernel.h: removed REPEAT_BYTE from kernel.h This patch creates wordpart.h and includes it in asm/word-at-a-time.h for all architectures. WORD_AT_A_TIME_CONSTANTS depends on kernel.h because of REPEAT_BYTE. Moving this to another header and including it where necessary allows us to not include the bloated kernel.h. Making this implicit dependency on REPEAT_BYTE explicit allows for later improvements in the lib/string.c inclusion list. Suggested-by: Al Viro Suggested-by: Andy Shevchenko Signed-off-by: Tanzir Hasan Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231226-libstringheader-v6-1-80aa08c7652c@google.com Signed-off-by: Kees Cook --- include/linux/wordpart.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 include/linux/wordpart.h (limited to 'include/linux/wordpart.h') diff --git a/include/linux/wordpart.h b/include/linux/wordpart.h new file mode 100644 index 000000000000..c9e6bd773ebd --- /dev/null +++ b/include/linux/wordpart.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_WORDPART_H +#define _LINUX_WORDPART_H +/** + * REPEAT_BYTE - repeat the value @x multiple times as an unsigned long value + * @x: value to repeat + * + * NOTE: @x is not checked for > 0xff; larger values produce odd results. + */ +#define REPEAT_BYTE(x) ((~0ul / 0xff) * (x)) + +#endif // _LINUX_WORDPART_H -- cgit v1.2.3