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s390 fixes for 6.13-rc4

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- Fix DirectMap accounting in /proc/meminfo file
 
 - Fix strscpy() return code handling that led to "unsigned 'len' is
   never less than zero" warning
 
 - Fix the calculation determining whether to use three- or four-level
   paging: account KMSAN modules metadata
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Merge tag 's390-6.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Alexander Gordeev:

 - Fix DirectMap accounting in /proc/meminfo file

 - Fix strscpy() return code handling that led to "unsigned 'len' is
   never less than zero" warning

 - Fix the calculation determining whether to use three- or four-level
   paging: account KMSAN modules metadata

* tag 's390-6.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/mm: Consider KMSAN modules metadata for paging levels
  s390/ipl: Fix never less than zero warning
  s390/mm: Fix DirectMap accounting
This commit is contained in:
Linus Torvalds 2024-12-17 09:09:32 -08:00
commit a241d7f0d3
3 changed files with 6 additions and 4 deletions
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2
arch/s390/boot/startup.c
View File

@ -234,6 +234,8 @@ static unsigned long get_vmem_size(unsigned long identity_size,
vsize = round_up(SZ_2G + max_mappable, rte_size) +
round_up(vmemmap_size, rte_size) +
FIXMAP_SIZE + MODULES_LEN + KASLR_LEN;
if (IS_ENABLED(CONFIG_KMSAN))
vsize += MODULES_LEN * 2;
return size_add(vsize, vmalloc_size);
}

6
arch/s390/boot/vmem.c
View File

@ -306,7 +306,7 @@ static void pgtable_pte_populate(pmd_t *pmd, unsigned long addr, unsigned long e
pages++;
}
}
if (mode == POPULATE_DIRECT)
if (mode == POPULATE_IDENTITY)
update_page_count(PG_DIRECT_MAP_4K, pages);
}
@ -339,7 +339,7 @@ static void pgtable_pmd_populate(pud_t *pud, unsigned long addr, unsigned long e
}
pgtable_pte_populate(pmd, addr, next, mode);
}
if (mode == POPULATE_DIRECT)
if (mode == POPULATE_IDENTITY)
update_page_count(PG_DIRECT_MAP_1M, pages);
}
@ -372,7 +372,7 @@ static void pgtable_pud_populate(p4d_t *p4d, unsigned long addr, unsigned long e
}
pgtable_pmd_populate(pud, addr, next, mode);
}
if (mode == POPULATE_DIRECT)
if (mode == POPULATE_IDENTITY)
update_page_count(PG_DIRECT_MAP_2G, pages);
}

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

@ -270,7 +270,7 @@ static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
if (len >= sizeof(_value)) \
return -E2BIG; \
len = strscpy(_value, buf, sizeof(_value)); \
if (len < 0) \
if ((ssize_t)len < 0) \
return len; \
strim(_value); \
return len; \