[PATCH 2/2] s390/vdso: Use symbolic constants for the PHDR permission flags

[Jens Remus <jremus@linux.ibm.com>]

While at it explicitly specify GNU_EH_FRAME PHDR to be read-only.

Inspired by x86 commit 8717b02b8c03 ("x86/entry/vdso: Include
GNU_PROPERTY and GNU_STACK PHDRs").

Signed-off-by: Jens Remus <jremus@linux.ibm.com>
---
 arch/s390/kernel/vdso/vdso.lds.S | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/s390/kernel/vdso/vdso.lds.S b/arch/s390/kernel/vdso/vdso.lds.S
index 7bec4de0e8e0..35ea7ede06c0 100644
--- a/arch/s390/kernel/vdso/vdso.lds.S
+++ b/arch/s390/kernel/vdso/vdso.lds.S
@@ -82,12 +82,16 @@ SECTIONS
  * We must supply the ELF program headers explicitly to get just one
  * PT_LOAD segment, and set the flags explicitly to make segments read-only.
  */
+#define PF_R	FLAGS(4)
+#define PF_RW	FLAGS(6)
+#define PF_RX	FLAGS(5)
+
 PHDRS
 {
-	text		PT_LOAD FILEHDR PHDRS FLAGS(5);	/* PF_R|PF_X */
-	dynamic		PT_DYNAMIC FLAGS(4);		/* PF_R */
-	note		PT_NOTE FLAGS(4);		/* PF_R */
-	eh_frame_hdr	PT_GNU_EH_FRAME;
+	text		PT_LOAD		PF_RX FILEHDR PHDRS;
+	dynamic		PT_DYNAMIC	PF_R;
+	note		PT_NOTE		PF_R;
+	eh_frame_hdr	PT_GNU_EH_FRAME	PF_R;
 }
 
 /*
-- 
2.53.0