nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity

arch/sparc: Define config parameter CPU_BIG_ENDIAN

Browse source 
Found this problem while enabling queued rwlock on SPARC.
The parameter CONFIG_CPU_BIG_ENDIAN is used to clear the
specific byte in qrwlock structure. Without this parameter,
we clear the wrong byte. Here is the code.

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

Define CPU_BIG_ENDIAN for SPARC to fix it.

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Babu Moger 2017-05-24 17:55:11 -06:00 committed by David S. Miller
parent 9ab6055f95
commit 97d9f96916
1 changed files with 3 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
arch/sparc/Kconfig
View file

@ -92,6 +92,9 @@ config ARCH_DEFCONFIG
config ARCH_PROC_KCORE_TEXT config ARCH_PROC_KCORE_TEXT
def_bool y def_bool y
config CPU_BIG_ENDIAN
def_bool y
config ARCH_ATU config ARCH_ATU
bool bool
default y if SPARC64 default y if SPARC64