[PATCH v1 1/2] s390/pgtable: switch read and write softbits for puds

Claudio Imbrenda
2024-04-25T13:06:11Z

There is no reason for the read and write softbits to be swapped in the
puds compared to pmds. They are different only because the softbits for
puds were introduced at the same time when the softbits for pmds were
swapped.

The current implementation is not wrong per se, since the macros are
defined correctly; only the documentation does not reflect reality.

With this patch, the read and write softbits for large pmd and large
puds will have the same layout, and will match the existing
documentation.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
arch/s390/include/asm/pgtable.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 60950e7a25f5..3da2995fd196 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -266,8 +266,8 @@ static inline int is_module_addr(void *addr)
#define _REGION3_ENTRY_DIRTY 0x2000 /* SW region dirty bit */
#define _REGION3_ENTRY_YOUNG 0x1000 /* SW region young bit */
#define _REGION3_ENTRY_LARGE 0x0400 /* RTTE-format control, large page */
-#define _REGION3_ENTRY_READ 0x0002 /* SW region read bit */
-#define _REGION3_ENTRY_WRITE 0x0001 /* SW region write bit */
+#define _REGION3_ENTRY_WRITE 0x0002 /* SW region write bit */
+#define _REGION3_ENTRY_READ 0x0001 /* SW region read bit */

#ifdef CONFIG_MEM_SOFT_DIRTY
#define _REGION3_ENTRY_SOFT_DIRTY 0x4000 /* SW region soft dirty bit */
--
2.44.0