s390/mm: correct comment about segment table entries

The comment describing the bit encoding for segment table entries
is incorrect in regard to the read and write bits. The segment
read bit is 0x0002 and write is 0x0001, not the other way around.

Reported-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 21e95cdcf8f62efda300a3a24ffd0878c7eaa209..7be9ae808a8b51505a0f82bdae39629877141986 100644 (file)
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -298,15 +298,15 @@ static inline int is_module_addr(void *addr)
 
 /*
  * Segment table entry encoding (R = read-only, I = invalid, y = young bit):
- *                             dy..R...I...wr
+ *                             dy..R...I...rw
  * prot-none, clean, old       00..1...1...00
  * prot-none, clean, young     01..1...1...00
  * prot-none, dirty, old       10..1...1...00
  * prot-none, dirty, young     11..1...1...00
- * read-only, clean, old       00..1...1...01
- * read-only, clean, young     01..1...0...01
- * read-only, dirty, old       10..1...1...01
- * read-only, dirty, young     11..1...0...01
+ * read-only, clean, old       00..1...1...10
+ * read-only, clean, young     01..1...0...10
+ * read-only, dirty, old       10..1...1...10
+ * read-only, dirty, young     11..1...0...10
  * read-write, clean, old      00..1...1...11
  * read-write, clean, young    01..1...0...11
  * read-write, dirty, old      10..0...1...11