linux-kernel - min() and max() have warning: comparison of distinct pointer types lacks a cast

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAFiDJ58CYnW4fK2iQvXK_8TBgAvTFdfwXx671AHOFT4JK1_COQ@mail.gmail.com>
Date:	Tue, 22 Apr 2014 13:46:23 +0800
From:	"LF.Tan" <lftan.linux@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: min() and max() have warning: comparison of distinct pointer types
 lacks a cast

Hi all

Have these warning messages when compiling kernel.
Anyone know what's wrong?

Regards.
----------------------------
In file included from mm/readahead.c:10:0:
mm/readahead.c: In function 'max_sane_readahead':
include/linux/kernel.h:713:17: warning: comparison of distinct pointer
types lacks a cast [enabled by default]
  (void) (&_min1 == &_min2);  \
                 ^
mm/readahead.c:242:9: note: in expansion of macro 'min'
  return min(nr, MAX_READAHEAD);
         ^

-------------------------------------------------------------------------------
mm/rmap.c:1279:22: note: in expansion of macro 'min'
 #define CLUSTER_SIZE min(32*PAGE_SIZE, PMD_SIZE)
                      ^
mm/rmap.c:1280:25: note: in expansion of macro 'CLUSTER_SIZE'
 #define CLUSTER_MASK (~(CLUSTER_SIZE - 1))
                         ^
mm/rmap.c:1298:39: note: in expansion of macro 'CLUSTER_MASK'
  address = (vma->vm_start + cursor) & CLUSTER_MASK;
                                       ^
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/