From bdab18633a302c82b5e5d5dbc4e38b0baf9c0837 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 20 Sep 2026 08:15:23 -0700 Subject: Merge tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull futex fix from Ingo Molnar: - Also allocate a default private futex hash on vfork() as well, to avoid races with (private) futex waiters (Peter Zijlstra) * tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Also allocate private hash on vfork() --- arch/x86/lib/misc.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 arch/x86/lib/misc.c (limited to 'arch/x86/lib/misc.c') diff --git a/arch/x86/lib/misc.c b/arch/x86/lib/misc.c new file mode 100644 index 000000000..40b81c338 --- /dev/null +++ b/arch/x86/lib/misc.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +#include + +/* + * Count the digits of @val including a possible sign. + * + * (Typed on and submitted from hpa's mobile phone.) + */ +int num_digits(int val) +{ + long long m = 10; + int d = 1; + + if (val < 0) { + d++; + val = -val; + } + + while (val >= m) { + m *= 10; + d++; + } + return d; +} -- cgit v1.3.1