linux-kernel - [EDAC ABI v13 19/25] i82975x_edac: Test nr_pages earlier to save a few CPU cycles

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]

Message-Id: <1334608729-30803-20-git-send-email-mchehab@redhat.com>
Date:	Mon, 16 Apr 2012 17:38:43 -0300
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Linux Edac Mailing List <linux-edac@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ranganathan Desikan <ravi@...ztechnologies.com>,
	"Arvind R." <arvino55@...il.com>
Subject: [EDAC ABI v13 19/25] i82975x_edac: Test nr_pages earlier to save a few CPU cycles

Avoid test nr_pages twice, and initializing some data that won't
be used.

Cleanup patch only.

Reported-by: Aristeu Rozanski Filho <arozansk@...hat.com>
Reviewed-by: Aristeu Rozanski <arozansk@...hat.com>
Cc: Ranganathan Desikan <ravi@...ztechnologies.com>
Cc: "Arvind R." <arvino55@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
---
 drivers/edac/i82975x_edac.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/edac/i82975x_edac.c b/drivers/edac/i82975x_edac.c
index ae2a857..df99606 100644
--- a/drivers/edac/i82975x_edac.c
+++ b/drivers/edac/i82975x_edac.c
@@ -410,6 +410,9 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
 			cumul_size);
 
 		nr_pages = cumul_size - last_cumul_size;
+		if (!nr_pages)
+			continue;
+
 		/*
 		 * Initialise dram labels
 		 * index values:
@@ -420,9 +423,6 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
 		for (chan = 0; chan < csrow->nr_channels; chan++) {
 			dimm = mci->csrows[index].channels[chan].dimm;
 
-			if (!nr_pages)
-				continue;
-
 			dimm->nr_pages = nr_pages / csrow->nr_channels;
 			strncpy(csrow->channels[chan].dimm->label,
 					labels[(index >> 1) + (chan * 2)],
@@ -433,9 +433,6 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
 			dimm->edac_mode = EDAC_SECDED; /* only supported */
 		}
 
-		if (!nr_pages)
-			continue;	/* not populated */
-
 		csrow->first_page = last_cumul_size;
 		csrow->last_page = cumul_size - 1;
 		last_cumul_size = cumul_size;
-- 
1.7.8

--
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/