diff options
| author | Alexander Kuleshov <[email protected]> | 2016-02-09 19:44:54 +0600 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-02-09 14:55:48 +0100 |
| commit | a91bbe017552b80e12d712c85549b933a62c6ed4 (patch) | |
| tree | 6388c18531a9eba0d743b2dbf60951fa3529566d | |
| parent | 8c0517759a1a100a8b83134cf3c7f254774aaeba (diff) | |
x86/boot: Use proper array element type in memset() size calculation
I changed open coded zeroing loops to explicit memset()s in the
following commit:
5e9ebbd87a99 ("x86/boot: Micro-optimize reset_early_page_tables()")
The base for the size argument of memset was sizeof(pud_p/pmd_p), which
are pointers - but the initialized array has pud_t/pmd_t elements.
Luckily the two types had the same size, so this did not result in any
runtime misbehavior.
Signed-off-by: Alexander Kuleshov <[email protected]>
Cc: Alexander Popov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/kernel/head64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 35843caa4ea7..7793a1702204 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -75,7 +75,7 @@ again: } pud_p = (pudval_t *)early_dynamic_pgts[next_early_pgt++]; - memset(pud_p, 0, sizeof(pud_p) * PTRS_PER_PUD); + memset(pud_p, 0, sizeof(*pud_p) * PTRS_PER_PUD); *pgd_p = (pgdval_t)pud_p - __START_KERNEL_map + phys_base + _KERNPG_TABLE; } pud_p += pud_index(address); @@ -90,7 +90,7 @@ again: } pmd_p = (pmdval_t *)early_dynamic_pgts[next_early_pgt++]; - memset(pmd_p, 0, sizeof(pmd_p) * PTRS_PER_PMD); + memset(pmd_p, 0, sizeof(*pmd_p) * PTRS_PER_PMD); *pud_p = (pudval_t)pmd_p - __START_KERNEL_map + phys_base + _KERNPG_TABLE; } pmd = (physaddr & PMD_MASK) + early_pmd_flags; |