linux-kernel - [PATCH v1] xarray: update document for error space returned by xarray normal API

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Message-Id: <1595218658-53727-1-git-send-email-w@laoqinren.net>
Date:   Mon, 20 Jul 2020 12:17:38 +0800
From:   Wang Long <w@...qinren.net>
To:     willy@...radead.org
Cc:     w@...qinren.net, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: [PATCH v1] xarray: update document for error space returned by xarray normal API

In the current xarray code, the negative value -1 and -4095 represented
as an error.

xa_is_err(xa_mk_internal(-4095)) and xa_is_err(xa_mk_internal(-1))
are all return true.

This patch update the document.

Signed-off-by: Wang Long <w@...qinren.net>
---
 include/linux/xarray.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/xarray.h b/include/linux/xarray.h
index b4d70e7..0588fb9 100644
--- a/include/linux/xarray.h
+++ b/include/linux/xarray.h
@@ -36,7 +36,7 @@
  * 257: Zero entry
  *
  * Errors are also represented as internal entries, but use the negative
- * space (-4094 to -2).  They're never stored in the slots array; only
+ * space (-4095 to -1).  They're never stored in the slots array; only
  * returned by the normal API.
  */
 
-- 
1.8.3.1