[PATCH 3/8] ima: simplify conditional statement to improve performance

From: Dmitry Kasatkin
Date: Wed Sep 03 2014 - 03:23:25 EST


Precede bit testing before string comparison makes code
faster. Also refactor statement as a single line pointer
assignment.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@xxxxxxxxxxx>
---
security/integrity/ima/ima_main.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index f82cf9b..f7b85bf 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -206,10 +206,8 @@ static int process_measurement(struct file *file, const char *filename,
}

template_desc = ima_template_desc_current();
- if (strcmp(template_desc->name, IMA_TEMPLATE_IMA_NAME) == 0) {
- if (action & IMA_APPRAISE_SUBMASK)
- xattr_ptr = &xattr_value;
- } else
+ if ((action & IMA_APPRAISE_SUBMASK) ||
+ strcmp(template_desc->name, IMA_TEMPLATE_IMA_NAME) != 0)
xattr_ptr = &xattr_value;

rc = ima_collect_measurement(iint, file, xattr_ptr, &xattr_len);
--
1.9.1

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