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s390/hwcaps: add sanity checks

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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>
This commit is contained in:
Heiko Carstens 2021-07-21 11:39:25 +02:00
parent 95655495e4
commit c68d463286
2 changed files with 4 additions and 0 deletions
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2
arch/s390/include/asm/elf.h
View File

@ -114,6 +114,7 @@ enum {
HWCAP_NR_VXRS_PDE2 = 19, HWCAP_NR_VXRS_PDE2 = 19,
HWCAP_NR_NNPA = 20, HWCAP_NR_NNPA = 20,
HWCAP_NR_PCI_MIO = 21, HWCAP_NR_PCI_MIO = 21,
HWCAP_NR_MAX
}; };
/* Bits present in AT_HWCAP. */ /* Bits present in AT_HWCAP. */
@ -142,6 +143,7 @@ enum {
enum { enum {
HWCAP_INT_NR_SIE = 0, HWCAP_INT_NR_SIE = 0,
HWCAP_INT_NR_MAX
}; };
/* Internal bits, not exposed via elf */ /* Internal bits, not exposed via elf */

2
arch/s390/kernel/processor.c
View File

@ -141,6 +141,8 @@ static void show_cpu_summary(struct seq_file *m, void *v)
}; };
int i, cpu; 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" seq_printf(m, "vendor_id : IBM/S390\n"
"# processors : %i\n" "# processors : %i\n"
"bogomips per cpu: %lu.%02lu\n", "bogomips per cpu: %lu.%02lu\n",