linux-kernel - [PATCH] mm/zsmalloc: Use BUG_ON instead of if condition followed by BUG.

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Message-Id: <1616727798-9110-1-git-send-email-zhouchuangao@vivo.com>
Date:   Thu, 25 Mar 2021 20:03:17 -0700
From:   zhouchuangao <zhouchuangao@...o.com>
To:     Minchan Kim <minchan@...nel.org>, Nitin Gupta <ngupta@...are.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     zhouchuangao <zhouchuangao@...o.com>
Subject: [PATCH] mm/zsmalloc: Use BUG_ON instead of if condition followed by BUG.

It can be optimized at compile time.

Signed-off-by: zhouchuangao <zhouchuangao@...o.com>
---
 mm/zsmalloc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 30c358b..58697f7 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1987,8 +1987,7 @@ static int zs_page_migrate(struct address_space *mapping, struct page *newpage,
 		head = obj_to_head(page, addr);
 		if (head & OBJ_ALLOCATED_TAG) {
 			handle = head & ~OBJ_ALLOCATED_TAG;
-			if (!testpin_tag(handle))
-				BUG();
+			BUG_ON(!testpin_tag(handle));
 
 			old_obj = handle_to_obj(handle);
 			obj_to_location(old_obj, &dummy, &obj_idx);
@@ -2035,8 +2034,7 @@ static int zs_page_migrate(struct address_space *mapping, struct page *newpage,
 		head = obj_to_head(page, addr);
 		if (head & OBJ_ALLOCATED_TAG) {
 			handle = head & ~OBJ_ALLOCATED_TAG;
-			if (!testpin_tag(handle))
-				BUG();
+			BUG_ON(!testpin_tag(handle));
 			unpin_tag(handle);
 		}
 	}
-- 
2.7.4