android_kernel_motorola_sm6375/arch/h8300
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Babu Moger 4c97a0c8fe arch: define CPU_BIG_ENDIAN for all fixed big endian archs
Patch series "Define CPU_BIG_ENDIAN or warn for inconsistencies", v3.

While working on enabling queued rwlock on SPARC, found this following
code in include/asm-generic/qrwlock.h which uses CONFIG_CPU_BIG_ENDIAN to
clear a byte.

static inline u8 *__qrwlock_write_byte(struct qrwlock *lock)
 {
	return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN);
 }

Problem is many of the fixed big endian architectures don't define
CPU_BIG_ENDIAN and clears the wrong byte.

Define CPU_BIG_ENDIAN for all the fixed big endian architecture to fix it.

Also found few more references of this config parameter in
drivers/of/base.c
drivers/of/fdt.c
drivers/tty/serial/earlycon.c
drivers/tty/serial/serial_core.c
Be aware that this may cause regressions if someone has worked-around
problems in the above code already. Remove the work-around.

Here is our original discussion
https://lkml.org/lkml/2017/5/24/620

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Babu Moger <[email protected]>
Suggested-by: Arnd Bergmann <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Acked-by: David S. Miller <[email protected]>
Acked-by: Stafford Horne <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Stefan Kristiansson <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Michael Ellerman <[email protected]> (powerpc)
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
2017-09-08 18:26:48 -07:00
..
boot Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
configs h8300: switch EARLYCON 2016-03-25 01:45:19 +09:00
include h8300: Mark _stext and _etext as char-arrays, not single char variables 2017-08-10 16:28:52 +02:00
kernel Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-07-03 16:14:51 -07:00
lib h8300: library functions 2015-06-23 13:35:54 +09:00
mm h8300: Memory management 2015-06-23 13:35:53 +09:00
Kconfig arch: define CPU_BIG_ENDIAN for all fixed big endian archs 2017-09-08 18:26:48 -07:00
Kconfig.cpu h8300: Build scripts 2015-06-23 13:35:54 +09:00
Makefile h8300: Don't set CROSS_COMPILE unconditionally 2015-11-08 22:44:43 +09:00