[PATCH v0 01/12] x86/mce: Do not use memset to clear the banks bitmaps

Borislav Petkov
2021-11-04T14:40:53Z

The bitmap is a single unsigned long so no need for the function call.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
arch/x86/kernel/cpu/mce/core.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 6ed365337a3b..52d277c955f9 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1340,8 +1340,8 @@ static noinstr void unexpected_machine_check(struct pt_regs *regs)
noinstr void do_machine_check(struct pt_regs *regs)
{
int worst = 0, order, no_way_out, kill_current_task, lmce;
- DECLARE_BITMAP(valid_banks, MAX_NR_BANKS);
- DECLARE_BITMAP(toclear, MAX_NR_BANKS);
+ DECLARE_BITMAP(valid_banks, MAX_NR_BANKS) = { 0 };
+ DECLARE_BITMAP(toclear, MAX_NR_BANKS) = { 0 };
struct mca_config *cfg = &mca_cfg;
struct mce m, *final;
char *msg = NULL;
@@ -1385,7 +1385,6 @@ noinstr void do_machine_check(struct pt_regs *regs)
final = this_cpu_ptr(&mces_seen);
*final = m;

- memset(valid_banks, 0, sizeof(valid_banks));
no_way_out = mce_no_way_out(&m, &msg, valid_banks, regs);

barrier();
--
2.29.2