Merge branch '2022-03-09-events-subsystem' into nextnext

To quote the author:
It is a common need in U-Boot to have one subsystem notify another
when something happens. An example is reading a partition table when a
new block device is set up.

It is also common to add weak functions and 'hook' functions to modify
how U-Boot works. See for example ft_board_setup() and the like.

U-Boot would benefit from a generic mechanism to handle these cases,
with the ability to hook into various 'events' in a
subsystem-independent and transparent way.

This series provides a way to create and dispatch events, with a way of
registering a 'spy' which watches for events of different types. This
allows 'hook' functions to be created in a generic way.

It also includes a script to list the hooks in an image, which is a bit
easier to debug than weak functions, as well as an 'event' command to
do the same from within U-Boot.

These 'static' events can be used to replace hooks like misc_init_f(),
for example. Also included is basic support for 'dynamic' events, where
a spy can be registered at runtime. The need for this is still being
figured out.

1 files changed, 2 insertions, 7 deletions

diff --git a/net/nfs.c b/net/nfs.c
index 70d0e08..3c01ceb 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -40,11 +40,6 @@
 
 #define HASHES_PER_LINE 65	/* Number of "loading" hashes per line	*/
 #define NFS_RETRY_COUNT 30
-#ifndef CONFIG_NFS_TIMEOUT
-# define NFS_TIMEOUT 2000UL
-#else
-# define NFS_TIMEOUT CONFIG_NFS_TIMEOUT
-#endif
 
 #define NFS_RPC_ERR	1
 #define NFS_RPC_DROP	124
@@ -53,7 +48,7 @@ static int fs_mounted;
 static unsigned long rpc_id;
 static int nfs_offset = -1;
 static int nfs_len;
-static ulong nfs_timeout = NFS_TIMEOUT;
+static const ulong nfs_timeout = CONFIG_NFS_TIMEOUT;
 
 static char dirfh[NFS_FHSIZE];	/* NFSv2 / NFSv3 file handle of directory */
 static char filefh[NFS3_FHSIZE]; /* NFSv2 / NFSv3 file handle */
@@ -733,7 +728,7 @@ static void nfs_timeout_handler(void)
 	} else {
 		puts("T ");
 		net_set_timeout_handler(nfs_timeout +
-					NFS_TIMEOUT * nfs_timeout_count,
+					nfs_timeout * nfs_timeout_count,
 					nfs_timeout_handler);
 		nfs_send();
 	}