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ipc: add definitions of USHORT_MAX and others

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Add definitions of USHORT_MAX and others into kernel.  ipc uses it and slub
implementation might also use it.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Cc: Nadia Derbey <Nadia.Derbey@bull.net>
Cc: "Pierre Peiffer" <peifferp@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Zhang, Yanmin 2008-04-29 01:00:55 -07:00 committed by Linus Torvalds
parent a5f75e7f25
commit 44f564a4bf
4 changed files with 11 additions and 9 deletions
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3
include/linux/kernel.h
View file

@ -20,6 +20,9 @@
extern const char linux_banner[];
extern const char linux_proc_banner[];
#define USHORT_MAX ((u16)(~0U))
#define SHORT_MAX ((s16)(USHORT_MAX>>1))
#define SHORT_MIN (-SHORT_MAX - 1)
#define INT_MAX ((int)(~0U>>1))
#define INT_MIN (-INT_MAX - 1)
#define UINT_MAX (~0U)

12
ipc/msg.c
View file

@ -346,19 +346,19 @@ copy_msqid_to_user(void __user *buf, struct msqid64_ds *in, int version)
out.msg_rtime = in->msg_rtime;
out.msg_ctime = in->msg_ctime;
if (in->msg_cbytes > USHRT_MAX)
out.msg_cbytes = USHRT_MAX;
if (in->msg_cbytes > USHORT_MAX)
out.msg_cbytes = USHORT_MAX;
else
out.msg_cbytes = in->msg_cbytes;
out.msg_lcbytes = in->msg_cbytes;
if (in->msg_qnum > USHRT_MAX)
out.msg_qnum = USHRT_MAX;
if (in->msg_qnum > USHORT_MAX)
out.msg_qnum = USHORT_MAX;
else
out.msg_qnum = in->msg_qnum;
if (in->msg_qbytes > USHRT_MAX)
out.msg_qbytes = USHRT_MAX;
if (in->msg_qbytes > USHORT_MAX)
out.msg_qbytes = USHORT_MAX;
else
out.msg_qbytes = in->msg_qbytes;
out.msg_lqbytes = in->msg_qbytes;

4
ipc/util.c
View file

@ -133,8 +133,8 @@ void ipc_init_ids(struct ipc_ids *ids)
ids->seq = 0;
{
int seq_limit = INT_MAX/SEQ_MULTIPLIER;
if(seq_limit > USHRT_MAX)
ids->seq_max = USHRT_MAX;
if (seq_limit > USHORT_MAX)
ids->seq_max = USHORT_MAX;
else
ids->seq_max = seq_limit;
}

1
ipc/util.h
View file

@ -12,7 +12,6 @@
#include <linux/err.h>
#define USHRT_MAX 0xffff
#define SEQ_MULTIPLIER (IPCMNI)
void sem_init (void);