linux-kernel - [PATCH 2/4] x86_32: apic/es7000_32, cpu_mask_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon,  2 Mar 2009 10:53:56 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	mingo@...hat.com
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Jiri Slaby <jirislaby@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 2/4] x86_32: apic/es7000_32, cpu_mask_to_apicid cleanup

Remove es7000_cpu_mask_to_apicid_cluster completely, because it's
almost the same as es7000_cpu_mask_to_apicid except 2 code paths.
One of them is about to be removed soon, the another should be
BAD_APICID (it's a fail path).

The _cluster one was not invoked on apic->cpu_mask_to_apicid_and
anyway, since there was no _cluster_and variant.

Also use newer cpumask functions.

Signed-off-by: Jiri Slaby <jirislaby@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
---
 arch/x86/kernel/apic/es7000_32.c |   46 +++----------------------------------
 1 files changed, 4 insertions(+), 42 deletions(-)

diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c
index da37e2c..9b9e86f 100644
--- a/arch/x86/kernel/apic/es7000_32.c
+++ b/arch/x86/kernel/apic/es7000_32.c
@@ -575,25 +575,21 @@ static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
 	return 1;
 }
 
-static unsigned int
-es7000_cpu_mask_to_apicid_cluster(const struct cpumask *cpumask)
+static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask)
 {
-	int cpus_found = 0;
-	int num_bits_set;
+	unsigned int cpu, num_bits_set, cpus_found = 0;
 	int apicid;
-	int cpu;
 
 	num_bits_set = cpumask_weight(cpumask);
 	/* Return id to all */
 	if (num_bits_set == nr_cpu_ids)
-		return 0xFF;
+		return es7000_cpu_to_logical_apicid(0);
 	/*
 	 * The cpus in the mask must all be on the apic cluster.  If are not
 	 * on the same apicid cluster return default value of target_cpus():
 	 */
 	cpu = cpumask_first(cpumask);
 	apicid = es7000_cpu_to_logical_apicid(cpu);
-
 	while (cpus_found < num_bits_set) {
 		if (cpumask_test_cpu(cpu, cpumask)) {
 			int new_apicid = es7000_cpu_to_logical_apicid(cpu);
@@ -601,40 +597,6 @@ es7000_cpu_mask_to_apicid_cluster(const struct cpumask *cpumask)
 			if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
 				WARN(1, "Not a valid mask!");
 
-				return 0xFF;
-			}
-			apicid = new_apicid;
-			cpus_found++;
-		}
-		cpu++;
-	}
-	return apicid;
-}
-
-static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask)
-{
-	int cpus_found = 0;
-	int num_bits_set;
-	int apicid;
-	int cpu;
-
-	num_bits_set = cpus_weight(*cpumask);
-	/* Return id to all */
-	if (num_bits_set == nr_cpu_ids)
-		return es7000_cpu_to_logical_apicid(0);
-	/*
-	 * The cpus in the mask must all be on the apic cluster.  If are not
-	 * on the same apicid cluster return default value of target_cpus():
-	 */
-	cpu = first_cpu(*cpumask);
-	apicid = es7000_cpu_to_logical_apicid(cpu);
-	while (cpus_found < num_bits_set) {
-		if (cpu_isset(cpu, *cpumask)) {
-			int new_apicid = es7000_cpu_to_logical_apicid(cpu);
-
-			if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
-				printk("%s: Not a valid mask!\n", __func__);
-
 				return es7000_cpu_to_logical_apicid(0);
 			}
 			apicid = new_apicid;
@@ -739,7 +701,7 @@ struct apic apic_es7000_cluster = {
 	.set_apic_id			= NULL,
 	.apic_id_mask			= 0xFF << 24,
 
-	.cpu_mask_to_apicid		= es7000_cpu_mask_to_apicid_cluster,
+	.cpu_mask_to_apicid		= es7000_cpu_mask_to_apicid,
 	.cpu_mask_to_apicid_and		= es7000_cpu_mask_to_apicid_and,
 
 	.send_IPI_mask			= es7000_send_IPI_mask,
-- 
1.6.1.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/