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Date: Tue, 13 Apr 2010 13:49:35 +0800
From: Amerigo Wang <xiyou.wangcong@...il.com>
To: Alexey Dobriyan <adobriyan@...il.com>
Cc: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Add USHRT_MAX, SHRT_MAX, SHRT_MIN
On Wed, Apr 14, 2010 at 12:52:06AM +0300, Alexey Dobriyan wrote:
>* C99 knows about USHRT_MAX/SHRT_MAX/SHRT_MIN, not USHORT_MAX/SHORT_MAX/SHORT_MIN.
This doesn't hurt much, but it is reasonable to make this change.
>* Make SHRT_MIN of type s16, not int, for consistency.
>
>Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
Acked-by: WANG Cong <xiyou.wangcong@...il.com>
Thanks!
>---
>
> drivers/scsi/fcoe/fcoe.c | 2 +-
> drivers/scsi/mpt2sas/mpt2sas_base.c | 2 +-
> drivers/scsi/mpt2sas/mpt2sas_config.c | 2 +-
> drivers/vhost/vhost.c | 2 +-
> fs/nfs/super.c | 4 ++--
> fs/nfsd/nfsctl.c | 4 ++--
> fs/ocfs2/blockcheck.c | 4 ++--
> include/linux/kernel.h | 6 +++---
> include/linux/sched.h | 2 +-
> include/net/ip.h | 6 +++---
> include/net/ipv6.h | 6 +++---
> ipc/msg.c | 12 ++++++------
> ipc/util.c | 4 ++--
> lib/vsprintf.c | 2 +-
> net/9p/protocol.c | 2 +-
> net/dccp/options.c | 2 +-
> net/ipv4/udp.c | 8 ++++----
> net/mac80211/sta_info.c | 2 +-
> net/sunrpc/rpcb_clnt.c | 2 +-
> 19 files changed, 37 insertions(+), 37 deletions(-)
>
>--- a/drivers/scsi/fcoe/fcoe.c
>+++ b/drivers/scsi/fcoe/fcoe.c
>@@ -683,7 +683,7 @@ static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost,
> }
>
> if (!lport->vport)
>- fc_host_max_npiv_vports(lport->host) = USHORT_MAX;
>+ fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
>
> snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
> "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
>--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
>+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
>@@ -3714,7 +3714,7 @@ _base_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
> if (ioc->config_cmds.status & MPT2_CMD_PENDING) {
> ioc->config_cmds.status |= MPT2_CMD_RESET;
> mpt2sas_base_free_smid(ioc, ioc->config_cmds.smid);
>- ioc->config_cmds.smid = USHORT_MAX;
>+ ioc->config_cmds.smid = USHRT_MAX;
> complete(&ioc->config_cmds.done);
> }
> break;
>--- a/drivers/scsi/mpt2sas/mpt2sas_config.c
>+++ b/drivers/scsi/mpt2sas/mpt2sas_config.c
>@@ -258,7 +258,7 @@ mpt2sas_config_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
> #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
> _config_display_some_debug(ioc, smid, "config_done", mpi_reply);
> #endif
>- ioc->config_cmds.smid = USHORT_MAX;
>+ ioc->config_cmds.smid = USHRT_MAX;
> complete(&ioc->config_cmds.done);
> return 1;
> }
>--- a/drivers/vhost/vhost.c
>+++ b/drivers/vhost/vhost.c
>@@ -802,7 +802,7 @@ static unsigned get_indirect(struct vhost_dev *dev, struct vhost_virtqueue *vq,
> count = indirect->len / sizeof desc;
> /* Buffers are chained via a 16 bit next field, so
> * we can have at most 2^16 of these. */
>- if (count > USHORT_MAX + 1) {
>+ if (count > USHRT_MAX + 1) {
> vq_err(vq, "Indirect buffer length too big: %d\n",
> indirect->len);
> return -E2BIG;
>--- a/fs/nfs/super.c
>+++ b/fs/nfs/super.c
>@@ -1064,7 +1064,7 @@ static int nfs_parse_mount_options(char *raw,
> goto out_nomem;
> rc = strict_strtoul(string, 10, &option);
> kfree(string);
>- if (rc != 0 || option > USHORT_MAX)
>+ if (rc != 0 || option > USHRT_MAX)
> goto out_invalid_value;
> mnt->nfs_server.port = option;
> break;
>@@ -1185,7 +1185,7 @@ static int nfs_parse_mount_options(char *raw,
> goto out_nomem;
> rc = strict_strtoul(string, 10, &option);
> kfree(string);
>- if (rc != 0 || option > USHORT_MAX)
>+ if (rc != 0 || option > USHRT_MAX)
> goto out_invalid_value;
> mnt->mount_server.port = option;
> break;
>--- a/fs/nfsd/nfsctl.c
>+++ b/fs/nfsd/nfsctl.c
>@@ -995,7 +995,7 @@ static ssize_t __write_ports_addxprt(char *buf)
> if (sscanf(buf, "%15s %4u", transport, &port) != 2)
> return -EINVAL;
>
>- if (port < 1 || port > USHORT_MAX)
>+ if (port < 1 || port > USHRT_MAX)
> return -EINVAL;
>
> err = nfsd_create_serv();
>@@ -1037,7 +1037,7 @@ static ssize_t __write_ports_delxprt(char *buf)
> if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
> return -EINVAL;
>
>- if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL)
>+ if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
> return -EINVAL;
>
> xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
>--- a/fs/ocfs2/blockcheck.c
>+++ b/fs/ocfs2/blockcheck.c
>@@ -403,7 +403,7 @@ void ocfs2_block_check_compute(void *data, size_t blocksize,
> * No ecc'd ocfs2 structure is larger than 4K, so ecc will be no
> * larger than 16 bits.
> */
>- BUG_ON(ecc > USHORT_MAX);
>+ BUG_ON(ecc > USHRT_MAX);
>
> bc->bc_crc32e = cpu_to_le32(crc);
> bc->bc_ecc = cpu_to_le16((u16)ecc);
>@@ -508,7 +508,7 @@ void ocfs2_block_check_compute_bhs(struct buffer_head **bhs, int nr,
> * No ecc'd ocfs2 structure is larger than 4K, so ecc will be no
> * larger than 16 bits.
> */
>- BUG_ON(ecc > USHORT_MAX);
>+ BUG_ON(ecc > USHRT_MAX);
>
> bc->bc_crc32e = cpu_to_le32(crc);
> bc->bc_ecc = cpu_to_le16((u16)ecc);
>--- a/include/linux/kernel.h
>+++ b/include/linux/kernel.h
>@@ -22,9 +22,9 @@
> 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 USHRT_MAX ((u16)(~0U))
>+#define SHRT_MAX ((s16)(USHRT_MAX>>1))
>+#define SHRT_MIN ((s16)(-SHRT_MAX - 1))
> #define INT_MAX ((int)(~0U>>1))
> #define INT_MIN (-INT_MAX - 1)
> #define UINT_MAX (~0U)
>--- a/include/linux/sched.h
>+++ b/include/linux/sched.h
>@@ -379,7 +379,7 @@ struct user_namespace;
> * 1-3 now and depends on arch. We use "5" as safe margin, here.
> */
> #define MAPCOUNT_ELF_CORE_MARGIN (5)
>-#define DEFAULT_MAX_MAP_COUNT (USHORT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
>+#define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
>
> extern int sysctl_max_map_count;
>
>--- a/include/net/ip.h
>+++ b/include/net/ip.h
>@@ -352,11 +352,11 @@ enum ip_defrag_users {
> IP_DEFRAG_LOCAL_DELIVER,
> IP_DEFRAG_CALL_RA_CHAIN,
> IP_DEFRAG_CONNTRACK_IN,
>- __IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHORT_MAX,
>+ __IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHRT_MAX,
> IP_DEFRAG_CONNTRACK_OUT,
>- __IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHORT_MAX,
>+ __IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
> IP_DEFRAG_CONNTRACK_BRIDGE_IN,
>- __IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHORT_MAX,
>+ __IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
> IP_DEFRAG_VS_IN,
> IP_DEFRAG_VS_OUT,
> IP_DEFRAG_VS_FWD
>--- a/include/net/ipv6.h
>+++ b/include/net/ipv6.h
>@@ -354,11 +354,11 @@ struct inet_frag_queue;
> enum ip6_defrag_users {
> IP6_DEFRAG_LOCAL_DELIVER,
> IP6_DEFRAG_CONNTRACK_IN,
>- __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHORT_MAX,
>+ __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
> IP6_DEFRAG_CONNTRACK_OUT,
>- __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHORT_MAX,
>+ __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
> IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
>- __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHORT_MAX,
>+ __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
> };
>
> struct ip6_create_arg {
>--- a/ipc/msg.c
>+++ b/ipc/msg.c
>@@ -345,19 +345,19 @@ 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 > USHORT_MAX)
>- out.msg_cbytes = USHORT_MAX;
>+ if (in->msg_cbytes > USHRT_MAX)
>+ out.msg_cbytes = USHRT_MAX;
> else
> out.msg_cbytes = in->msg_cbytes;
> out.msg_lcbytes = in->msg_cbytes;
>
>- if (in->msg_qnum > USHORT_MAX)
>- out.msg_qnum = USHORT_MAX;
>+ if (in->msg_qnum > USHRT_MAX)
>+ out.msg_qnum = USHRT_MAX;
> else
> out.msg_qnum = in->msg_qnum;
>
>- if (in->msg_qbytes > USHORT_MAX)
>- out.msg_qbytes = USHORT_MAX;
>+ if (in->msg_qbytes > USHRT_MAX)
>+ out.msg_qbytes = USHRT_MAX;
> else
> out.msg_qbytes = in->msg_qbytes;
> out.msg_lqbytes = in->msg_qbytes;
>--- a/ipc/util.c
>+++ b/ipc/util.c
>@@ -124,8 +124,8 @@ void ipc_init_ids(struct ipc_ids *ids)
> ids->seq = 0;
> {
> int seq_limit = INT_MAX/SEQ_MULTIPLIER;
>- if (seq_limit > USHORT_MAX)
>- ids->seq_max = USHORT_MAX;
>+ if (seq_limit > USHRT_MAX)
>+ ids->seq_max = USHRT_MAX;
> else
> ids->seq_max = seq_limit;
> }
>--- a/lib/vsprintf.c
>+++ b/lib/vsprintf.c
>@@ -1979,7 +1979,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
> {
> char *s = (char *)va_arg(args, char *);
> if (field_width == -1)
>- field_width = SHORT_MAX;
>+ field_width = SHRT_MAX;
> /* first, skip leading white space in buffer */
> str = skip_spaces(str);
>
>--- a/net/9p/protocol.c
>+++ b/net/9p/protocol.c
>@@ -393,7 +393,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
> const char *sptr = va_arg(ap, const char *);
> int16_t len = 0;
> if (sptr)
>- len = MIN(strlen(sptr), USHORT_MAX);
>+ len = MIN(strlen(sptr), USHRT_MAX);
>
> errcode = p9pdu_writef(pdu, proto_version,
> "w", len);
>--- a/net/dccp/options.c
>+++ b/net/dccp/options.c
>@@ -296,7 +296,7 @@ static inline u8 dccp_ndp_len(const u64 ndp)
> {
> if (likely(ndp <= 0xFF))
> return 1;
>- return likely(ndp <= USHORT_MAX) ? 2 : (ndp <= UINT_MAX ? 4 : 6);
>+ return likely(ndp <= USHRT_MAX) ? 2 : (ndp <= UINT_MAX ? 4 : 6);
> }
>
> int dccp_insert_option(struct sock *sk, struct sk_buff *skb,
>--- a/net/ipv4/udp.c
>+++ b/net/ipv4/udp.c
>@@ -1676,8 +1676,8 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
> return -ENOPROTOOPT;
> if (val != 0 && val < 8) /* Illegal coverage: use default (8) */
> val = 8;
>- else if (val > USHORT_MAX)
>- val = USHORT_MAX;
>+ else if (val > USHRT_MAX)
>+ val = USHRT_MAX;
> up->pcslen = val;
> up->pcflag |= UDPLITE_SEND_CC;
> break;
>@@ -1690,8 +1690,8 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
> return -ENOPROTOOPT;
> if (val != 0 && val < 8) /* Avoid silly minimal values. */
> val = 8;
>- else if (val > USHORT_MAX)
>- val = USHORT_MAX;
>+ else if (val > USHRT_MAX)
>+ val = USHRT_MAX;
> up->pcrlen = val;
> up->pcflag |= UDPLITE_RECV_CC;
> break;
>--- a/net/mac80211/sta_info.c
>+++ b/net/mac80211/sta_info.c
>@@ -250,7 +250,7 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
> skb_queue_head_init(&sta->tx_filtered);
>
> for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
>- sta->last_seq_ctrl[i] = cpu_to_le16(USHORT_MAX);
>+ sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
>
> #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
> printk(KERN_DEBUG "%s: Allocated STA %pM\n",
>--- a/net/sunrpc/rpcb_clnt.c
>+++ b/net/sunrpc/rpcb_clnt.c
>@@ -783,7 +783,7 @@ static int rpcb_dec_getport(struct rpc_rqst *req, __be32 *p,
> port = ntohl(*p);
> dprintk("RPC: %5u PMAP_%s result: %lu\n", task->tk_pid,
> task->tk_msg.rpc_proc->p_name, port);
>- if (unlikely(port > USHORT_MAX))
>+ if (unlikely(port > USHRT_MAX))
> return -EIO;
>
> rpcb->r_port = port;
>--
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