net: rename busy poll socket op and globals

Rename LL_SO to BUSY_POLL_SO
Rename sysctl_net_ll_{read,poll} to sysctl_busy_{read,poll}
Fix up users of these variables.
Fix documentation for sysctl.

a patch for the socket.7  man page will follow separately,
because of limitations of my mail setup.

Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

20 files changed, 37 insertions, 36 deletions

diff --git a/Documentation/sysctl/net.txt b/Documentation/sysctl/net.txt
index d69e14c9002c..1c15043aaee4 100644
--- a/Documentation/sysctl/net.txt
+++ b/Documentation/sysctl/net.txt
@@ -50,26 +50,27 @@ The maximum number of packets that kernel can handle on a NAPI interrupt,
 it's a Per-CPU variable.
 Default: 64
 
-low_latency_read
+busy_read
 ----------------
 Low latency busy poll timeout for socket reads. (needs CONFIG_NET_LL_RX_POLL)
 Approximate time in us to busy loop waiting for packets on the device queue.
-This sets the default value of the SO_LL socket option.
-Can be set or overridden per socket by setting socket option SO_LL, which is
-the preferred method of enabling.
-If you need to enable the feature globally via sysctl, a value of 50 is recommended.
+This sets the default value of the SO_BUSY_POLL socket option.
+Can be set or overridden per socket by setting socket option SO_BUSY_POLL,
+which is the preferred method of enabling. If you need to enable the feature
+globally via sysctl, a value of 50 is recommended.
 Will increase power usage.
 Default: 0 (off)
 
-low_latency_poll
+busy_poll
 ----------------
 Low latency busy poll timeout for poll and select. (needs CONFIG_NET_LL_RX_POLL)
 Approximate time in us to busy loop waiting for events.
 Recommended value depends on the number of sockets you poll on.
 For several sockets 50, for several hundreds 100.
 For more than that you probably want to use epoll.
-Note that only sockets with SO_LL set will be busy polled, so you want to either
-selectively set SO_LL on those sockets or set sysctl.net.low_latency_read globally.
+Note that only sockets with SO_BUSY_POLL set will be busy polled,
+so you want to either selectively set SO_BUSY_POLL on those sockets or set
+sysctl.net.busy_read globally.
 Will increase power usage.
 Default: 0 (off)
 
diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 4885825e498d..467de010ea7e 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -81,6 +81,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL                    46
 
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/avr32/include/uapi/asm/socket.h b/arch/avr32/include/uapi/asm/socket.h
index 79b61798ebf8..11c4259c62fb 100644
--- a/arch/avr32/include/uapi/asm/socket.h
+++ b/arch/avr32/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* __ASM_AVR32_SOCKET_H */
diff --git a/arch/cris/include/uapi/asm/socket.h b/arch/cris/include/uapi/asm/socket.h
index 47b1ec55092d..eb723e51554e 100644
--- a/arch/cris/include/uapi/asm/socket.h
+++ b/arch/cris/include/uapi/asm/socket.h
@@ -76,7 +76,7 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _ASM_SOCKET_H */
 
diff --git a/arch/frv/include/uapi/asm/socket.h b/arch/frv/include/uapi/asm/socket.h
index dbc08520f22c..f0cb1c341163 100644
--- a/arch/frv/include/uapi/asm/socket.h
+++ b/arch/frv/include/uapi/asm/socket.h
@@ -74,7 +74,7 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _ASM_SOCKET_H */
 
diff --git a/arch/h8300/include/uapi/asm/socket.h b/arch/h8300/include/uapi/asm/socket.h
index a38d38a6520b..9490758c5e2b 100644
--- a/arch/h8300/include/uapi/asm/socket.h
+++ b/arch/h8300/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _ASM_SOCKET_H */
diff --git a/arch/ia64/include/uapi/asm/socket.h b/arch/ia64/include/uapi/asm/socket.h
index d3358b760681..556d0701a155 100644
--- a/arch/ia64/include/uapi/asm/socket.h
+++ b/arch/ia64/include/uapi/asm/socket.h
@@ -83,6 +83,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _ASM_IA64_SOCKET_H */
diff --git a/arch/m32r/include/uapi/asm/socket.h b/arch/m32r/include/uapi/asm/socket.h
index 44aaf4639a4a..24be7c8da86a 100644
--- a/arch/m32r/include/uapi/asm/socket.h
+++ b/arch/m32r/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _ASM_M32R_SOCKET_H */
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index 6a07992ba6c6..61c01f054d1b 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -92,6 +92,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/mn10300/include/uapi/asm/socket.h b/arch/mn10300/include/uapi/asm/socket.h
index db80fd3e398b..e2a2b203eb00 100644
--- a/arch/mn10300/include/uapi/asm/socket.h
+++ b/arch/mn10300/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _ASM_SOCKET_H */
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index f866fff9a004..71700e636a8e 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -73,7 +73,7 @@
 
 #define SO_SELECT_ERR_QUEUE     0x4026
 
-#define SO_LL                   0x4027
+#define SO_BUSY_POLL            0x4027
 
 /* O_NONBLOCK clashes with the bits used for socket types.  Therefore we
  * have to define SOCK_NONBLOCK to a different value here.
diff --git a/arch/powerpc/include/uapi/asm/socket.h b/arch/powerpc/include/uapi/asm/socket.h
index 405fb09bda94..a6d74467c9ed 100644
--- a/arch/powerpc/include/uapi/asm/socket.h
+++ b/arch/powerpc/include/uapi/asm/socket.h
@@ -81,6 +81,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif  /* _ASM_POWERPC_SOCKET_H */
diff --git a/arch/s390/include/uapi/asm/socket.h b/arch/s390/include/uapi/asm/socket.h
index 0c5105fbaaf3..92494494692e 100644
--- a/arch/s390/include/uapi/asm/socket.h
+++ b/arch/s390/include/uapi/asm/socket.h
@@ -80,6 +80,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* _ASM_SOCKET_H */
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index b46c3fa0b265..4e1d66c3ce71 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -70,7 +70,7 @@
 
 #define SO_SELECT_ERR_QUEUE     0x0029
 
-#define SO_LL                   0x0030
+#define SO_BUSY_POLL            0x0030
 
 /* Security levels - as per NRL IPv6 - don't actually do anything */
 #define SO_SECURITY_AUTHENTICATION              0x5001
diff --git a/arch/xtensa/include/uapi/asm/socket.h b/arch/xtensa/include/uapi/asm/socket.h
index b21ace4fc9ba..c114483010c1 100644
--- a/arch/xtensa/include/uapi/asm/socket.h
+++ b/arch/xtensa/include/uapi/asm/socket.h
@@ -85,6 +85,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif  /* _XTENSA_SOCKET_H */
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index 4ff71908fd42..a14339c2985f 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -30,8 +30,8 @@
 #ifdef CONFIG_NET_LL_RX_POLL
 
 struct napi_struct;
-extern unsigned int sysctl_net_ll_read __read_mostly;
-extern unsigned int sysctl_net_ll_poll __read_mostly;
+extern unsigned int sysctl_net_busy_read __read_mostly;
+extern unsigned int sysctl_net_busy_poll __read_mostly;
 
 /* return values from ndo_ll_poll */
 #define LL_FLUSH_FAILED         -1
@@ -39,7 +39,7 @@ extern unsigned int sysctl_net_ll_poll __read_mostly;
 
 static inline bool net_busy_loop_on(void)
 {
-        return sysctl_net_ll_poll;
+        return sysctl_net_busy_poll;
 }
 
 /* a wrapper to make debug_smp_processor_id() happy
@@ -72,7 +72,7 @@ static inline unsigned long sk_busy_loop_end_time(struct sock *sk)
 /* in poll/select we use the global sysctl_net_ll_poll value */
 static inline unsigned long busy_loop_end_time(void)
 {
-        return busy_loop_us_clock() + ACCESS_ONCE(sysctl_net_ll_poll);
+        return busy_loop_us_clock() + ACCESS_ONCE(sysctl_net_busy_poll);
 }
 
 static inline bool sk_can_busy_loop(struct sock *sk)
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index ca3a20d772ac..f04b69b6abf2 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -76,6 +76,6 @@
 
 #define SO_SELECT_ERR_QUEUE     45
 
-#define SO_LL                   46
+#define SO_BUSY_POLL            46
 
 #endif /* __ASM_GENERIC_SOCKET_H */
diff --git a/net/core/sock.c b/net/core/sock.c
index 9bfe83f4d670..548d716c5f62 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -901,7 +901,7 @@ set_rcvbuf:
                 break;
 
 #ifdef CONFIG_NET_LL_RX_POLL
-        case SO_LL:
+        case SO_BUSY_POLL:
                 /* allow unprivileged users to decrease the value */
                 if ((val > sk->sk_ll_usec) && !capable(CAP_NET_ADMIN))
                         ret = -EPERM;
@@ -1171,7 +1171,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
                 break;
 
 #ifdef CONFIG_NET_LL_RX_POLL
-        case SO_LL:
+        case SO_BUSY_POLL:
                 v.val = sk->sk_ll_usec;
                 break;
 #endif
@@ -2294,7 +2294,7 @@ void sock_init_data(struct socket *sock, struct sock *sk)
 
 #ifdef CONFIG_NET_LL_RX_POLL
         sk->sk_napi_id          =       0;
-        sk->sk_ll_usec          =       sysctl_net_ll_read;
+        sk->sk_ll_usec          =       sysctl_net_busy_read;
 #endif
 
         /*
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 1a298cb3daee..660968616637 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -300,15 +300,15 @@ static struct ctl_table net_core_table[] = {
 #endif /* CONFIG_NET_FLOW_LIMIT */
 #ifdef CONFIG_NET_LL_RX_POLL
         {
-                .procname       = "low_latency_poll",
-                .data           = &sysctl_net_ll_poll,
+                .procname       = "busy_poll",
+                .data           = &sysctl_net_busy_poll,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
                 .proc_handler   = proc_dointvec
         },
         {
-                .procname       = "low_latency_read",
-                .data           = &sysctl_net_ll_read,
+                .procname       = "busy_read",
+                .data           = &sysctl_net_busy_read,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
                 .proc_handler   = proc_dointvec
diff --git a/net/socket.c b/net/socket.c
index 6a3e9a3f50ad..829b460acb87 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -107,8 +107,8 @@
 #include <net/busy_poll.h>
 
 #ifdef CONFIG_NET_LL_RX_POLL
-unsigned int sysctl_net_ll_read __read_mostly;
-unsigned int sysctl_net_ll_poll __read_mostly;
+unsigned int sysctl_net_busy_read __read_mostly;
+unsigned int sysctl_net_busy_poll __read_mostly;
 #endif
 
 static int sock_no_open(struct inode *irrelevant, struct file *dontcare);