Received-SPF: pass (google.com: domain of linux-kernel+bounces-137272-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99;
From: Kyle Meyer <kyle.meyer@hpe.com>
To: linux-kernel@vger.kernel.org, yury.norov@gmail.com,
        andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk,
        mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
        vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
        rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
        bristot@redhat.com, vschneid@redhat.com
Cc: russ.anderson@hpe.com, dimitri.sivanich@hpe.com, steve.wahl@hpe.com,
        Kyle Meyer <kyle.meyer@hpe.com>
Subject: [PATCH 1/2 RESEND] cpumask: Add for_each_cpu_from()
Date: Tue,  9 Apr 2024 10:52:49 -0500
Message-Id: <20240409155250.3660517-2-kyle.meyer@hpe.com>
In-Reply-To: <20240409155250.3660517-1-kyle.meyer@hpe.com>
References: <20240409155250.3660517-1-kyle.meyer@hpe.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

Add for_each_cpu_from() as a generic cpumask macro.

for_each_cpu_from() is the same as for_each_cpu(), except it starts at
@cpu instead of zero.

Signed-off-by: Kyle Meyer <kyle.meyer@hpe.com>
Acked-by: Yury Norov <yury.norov@gmail.com>
---
 include/linux/cpumask.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 1c29947db848..655211db38ff 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -368,6 +368,16 @@ unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int sta
 #define for_each_cpu_or(cpu, mask1, mask2)				\
 	for_each_or_bit(cpu, cpumask_bits(mask1), cpumask_bits(mask2), small_cpumask_bits)
 
+/**
+ * for_each_cpu_from - iterate over every cpu present in @mask, starting at @cpu
+ * @cpu: the (optionally unsigned) integer iterator
+ * @mask: the cpumask pointer
+ *
+ * After the loop, cpu is >= nr_cpu_ids.
+ */
+#define for_each_cpu_from(cpu, mask)				\
+	for_each_set_bit_from(cpu, cpumask_bits(mask), small_cpumask_bits)
+
 /**
  * cpumask_any_but - return a "random" in a cpumask, but not this one.
  * @mask: the cpumask to search
-- 
2.44.0