zipl/boot: constify data in section stage2_head

Declare `magic`, `tape_head`, and `stage2_head` as const. Acked-by: Eduard Shishkin <edward6@linux.ibm.com> Acked-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
ibm-s390-linux · Mar 31, 2023 · e6be1c1 · e6be1c1
1 parent a4eb03d
commit e6be1c1
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Showing 5 changed files with 5 additions and 5 deletions.
diff --git a/zipl/boot/eckd2dump_mv.c b/zipl/boot/eckd2dump_mv.c
@@ -21,7 +21,7 @@
 /*
  * Magic number at start of dump record
  */
-uint64_t __section(.stage2.head) magic = 0x584d554c54363401ULL; /* XMULT64, version 1 */
+const uint64_t __section(.stage2.head) magic = 0x584d554c54363401ULL; /* XMULT64, version 1 */
 
 /*
  * Parameter format for ECKD MV dumper (13 bytes):

diff --git a/zipl/boot/eckd2dump_sv.c b/zipl/boot/eckd2dump_sv.c
@@ -19,7 +19,7 @@
 /*
  * Magic number at start of dump record
  */
-uint64_t __section(.stage2.head) magic = 0x5845434b44363401ULL; /* "XECKD64", version 1 */
+const uint64_t __section(.stage2.head) magic = 0x5845434b44363401ULL; /* "XECKD64", version 1 */
 
 /*
  * Get device characteristics from zipl parameter block

diff --git a/zipl/boot/fba2dump.c b/zipl/boot/fba2dump.c
@@ -23,7 +23,7 @@
 /*
  * Magic number at start of dump record
  */
-uint64_t __section(.stage2.head) magic = 0x5844464241363401ULL; /* XDFBA64, version 1 */
+const uint64_t __section(.stage2.head) magic = 0x5844464241363401ULL; /* XDFBA64, version 1 */
 
 /*
  * FBA dump device partition specification

diff --git a/zipl/boot/stage2.c b/zipl/boot/stage2.c
@@ -148,4 +148,4 @@ void panic_notify(unsigned long UNUSED(reason))
 {
 }
 
-uint64_t __section(.stage2.head) stage2_head;
+const uint64_t __section(.stage2.head) stage2_head;
diff --git a/zipl/boot/tape2dump.c b/zipl/boot/tape2dump.c
@@ -37,7 +37,7 @@ struct tape_head {
 	uint64_t	ccw2;
 } __packed;
 
-struct tape_head __section(.stage2.head) tape_head = {
+const struct tape_head __section(.stage2.head) tape_head = {
 	.psw	= PSW_LOAD | STAGE2_ENTRY, /* Start code at 0x2018 */
 	.ccw1	= 0x0700000060000001ULL, /* Rewind ccw */
 	.ccw2	= 0x0200200020003000ULL, /* CCW to load dump tool to 0x2000 */