From c68d463286cd481cfbc4b0207fafef1ef5506d3b Mon Sep 17 00:00:00 2001
From: Heiko Carstens <hca@linux.ibm.com>
Date: Wed, 21 Jul 2021 11:39:25 +0200
Subject: [PATCH] s390/hwcaps: add sanity checks
Add BUILD_BUG_ON() sanity checks to make sure the hwcap string array
contains a string for each hwcap.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
arch/s390/include/asm/elf.h | 2 ++
arch/s390/kernel/processor.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index 88f7b7e7c08aa..f02273831473b 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -114,6 +114,7 @@ enum {
HWCAP_NR_VXRS_PDE2 = 19,
HWCAP_NR_NNPA = 20,
HWCAP_NR_PCI_MIO = 21,
+ HWCAP_NR_MAX
};
/* Bits present in AT_HWCAP. */
@@ -142,6 +143,7 @@ enum {
enum {
HWCAP_INT_NR_SIE = 0,
+ HWCAP_INT_NR_MAX
};
/* Internal bits, not exposed via elf */
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 1eb2410d9fb27..e0efe946d8f01 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -141,6 +141,8 @@ static void show_cpu_summary(struct seq_file *m, void *v)
};
int i, cpu;
+ BUILD_BUG_ON(ARRAY_SIZE(hwcap_str) != HWCAP_NR_MAX);
+ BUILD_BUG_ON(ARRAY_SIZE(int_hwcap_str) != HWCAP_INT_NR_MAX);
seq_printf(m, "vendor_id : IBM/S390\n"
"# processors : %i\n"
"bogomips per cpu: %lu.%02lu\n",
--
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