linux-kernel - [PATCH v2] fs/pstore: Optimization function ramoops_init

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Date:	Wed, 18 Mar 2015 01:41:07 +0000
From:	Wang Long <long.wanglong@...wei.com>
To:	<keescook@...omium.org>, <anton@...msg.org>, <ccross@...roid.com>,
	<tony.luck@...el.com>
CC:	<linux-kernel@...r.kernel.org>, <long.wanglong@...wei.com>,
	<peifeiyue@...wei.com>, <marco.stornelli@...il.com>,
	<anton.vorontsov@...aro.org>, <salyzyn@...roid.com>,
	<sergiu@...omium.org>
Subject: [PATCH v2] fs/pstore: Optimization function ramoops_init_przs

The value of cxt->record_size does not change in the loop,
so this patch optimize the assign statement by dropping
sz entirely and using cxt->record_size in its place.

Signed-off-by: Wang Long <long.wanglong@...wei.com>
---
 fs/pstore/ram.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 44a549b..f29373d 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -394,18 +394,16 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
 	}
 
 	for (i = 0; i < cxt->max_dump_cnt; i++) {
-		size_t sz = cxt->record_size;
-
-		cxt->przs[i] = persistent_ram_new(*paddr, sz, 0,
+		cxt->przs[i] = persistent_ram_new(*paddr, cxt->record_size, 0,
 						  &cxt->ecc_info,
 						  cxt->memtype);
 		if (IS_ERR(cxt->przs[i])) {
 			err = PTR_ERR(cxt->przs[i]);
 			dev_err(dev, "failed to request mem region (0x%zx@...llx): %d\n",
-				sz, (unsigned long long)*paddr, err);
+				cxt->record_size, (unsigned long long)*paddr, err);
 			goto fail_prz;
 		}
-		*paddr += sz;
+		*paddr += cxt->record_size;
 	}
 
 	return 0;
-- 
1.8.3.4

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