From: Ralf Baechle <ralf@linux-mips.org>
Date: Sat, 1 Jul 2006 11:36:25 +0000 (-0700)
Subject: [PATCH] Fix IS_ERR Threshold Value
X-Git-Tag: firefly_0821_release~34580
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fa79837d5b562766a3e3cfad4753a3df8e0a1319;p=firefly-linux-kernel-4.4.55.git

[PATCH] Fix IS_ERR Threshold Value

 o Raise the maximum error number in IS_ERR_VALUE to 4095.
 o Make that number available as a new constant MAX_ERRNO.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/include/linux/err.h b/include/linux/err.h
index ff71d2af5da3..cd3b367f7445 100644
--- a/include/linux/err.h
+++ b/include/linux/err.h
@@ -13,7 +13,9 @@
  * This should be a per-architecture thing, to allow different
  * error and pointer decisions.
  */
-#define IS_ERR_VALUE(x) unlikely((x) > (unsigned long)-1000L)
+#define MAX_ERRNO	4095
+
+#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
 
 static inline void *ERR_PTR(long error)
 {