diff --git a/Changes b/Changes
index 594e28865..0553481e4 100644
--- a/Changes
+++ b/Changes
@@ -120,6 +120,10 @@ Various pages
     Michael Kerrisk
         SEE ALSO: Place entries in correct order
 
+Various pages
+    Michael Kerrisk
+        ERRORS: Place errors in alphabetical order
+
 Various pages
     Michael Kerrisk
         Remove redundant section number in page references
diff --git a/man2/keyctl.2 b/man2/keyctl.2
index 74be89469..62450ffa8 100644
--- a/man2/keyctl.2
+++ b/man2/keyctl.2
@@ -85,24 +85,24 @@ On error, the value
 will be returned and errno will have been set to an appropriate error.
 .SH ERRORS
 .TP
-.B ENOKEY
-No matching key was found or an invalid key was specified.
-.TP
-.B EKEYEXPIRED
-An expired key was found or specified.
-.TP
-.B EKEYREVOKED
-A revoked key was found or specified.
-.TP
-.B EKEYREJECTED
-A rejected key was found or specified.
+.B EACCES
+A key operation wasn't permitted.
 .TP
 .B EDQUOT
 The key quota for the caller's user would be exceeded by creating a key or
 linking it to the keyring.
 .TP
-.B EACCES
-A key operation wasn't permitted.
+.B EKEYEXPIRED
+An expired key was found or specified.
+.TP
+.B EKEYREJECTED
+A rejected key was found or specified.
+.TP
+.B EKEYREVOKED
+A revoked key was found or specified.
+.TP
+.B ENOKEY
+No matching key was found or an invalid key was specified.
 .SH LINKING
 Although this is a Linux system call, it is not present in
 .I libc
diff --git a/man2/request_key.2 b/man2/request_key.2
index 2d8c64bee..a32d3cfde 100644
--- a/man2/request_key.2
+++ b/man2/request_key.2
@@ -95,20 +95,8 @@ On error, the value
 will be returned and errno will have been set to an appropriate error.
 .SH ERRORS
 .TP
-.B ENOKEY
-No matching key was found.
-.TP
-.B EKEYEXPIRED
-An expired key was found, but no replacement could be obtained.
-.TP
-.B EKEYREVOKED
-A revoked key was found, but no replacement could be obtained.
-.TP
-.B EKEYREJECTED
-The attempt to generate a new key was rejected.
-.TP
-.B ENOMEM
-Insufficient memory to create a key.
+.B EACCES
+The keyring wasn't available for modification by the user.
 .TP
 .B EINTR
 The request was interrupted by a signal.
@@ -117,8 +105,20 @@ The request was interrupted by a signal.
 The key quota for this user would be exceeded by creating this key or linking
 it to the keyring.
 .TP
-.B EACCES
-The keyring wasn't available for modification by the user.
+.B EKEYEXPIRED
+An expired key was found, but no replacement could be obtained.
+.TP
+.B EKEYREJECTED
+The attempt to generate a new key was rejected.
+.TP
+.B EKEYREVOKED
+A revoked key was found, but no replacement could be obtained.
+.TP
+.B ENOMEM
+Insufficient memory to create a key.
+.TP
+.B ENOKEY
+No matching key was found.
 .SH LINKING
 Although this is a Linux system call, it is not present in
 .I libc
diff --git a/man2/subpage_prot.2 b/man2/subpage_prot.2
index 47662464c..56def7506 100644
--- a/man2/subpage_prot.2
+++ b/man2/subpage_prot.2
@@ -65,6 +65,11 @@ returns 0.
 Otherwise, one of the error codes specified below is returned.
 .SH ERRORS
 .TP
+.B EFAULT
+The buffer referred to by
+.I map
+is not accessible.
+.TP
 .B EINVAL
 The
 .I addr
@@ -75,11 +80,6 @@ Both of these arguments must be aligned to a multiple of the system page size,
 and they must not refer to a region outside of the
 address space of the process or to a region that consists of huge pages.
 .TP
-.B EFAULT
-The buffer referred to by
-.I map
-is not accessible.
-.TP
 .B ENOMEM
 Out of memory.
 .SH VERSIONS
diff --git a/man2/syslog.2 b/man2/syslog.2
index c5d01bbf9..fb018a637 100644
--- a/man2/syslog.2
+++ b/man2/syslog.2
@@ -225,6 +225,13 @@ is less than zero; or for
 .I level
 is outside the range 1 to 8).
 .TP
+.B ENOSYS
+This
+.BR syslog ()
+system call is not available, because the kernel was compiled with the
+.BR CONFIG_PRINTK
+kernel-configuration option disabled.
+.TP
 .B EPERM
 An attempt was made to change console_loglevel or clear the kernel
 message ring buffer by a process without sufficient privilege
@@ -235,13 +242,6 @@ capability).
 .B ERESTARTSYS
 System call was interrupted by a signal; nothing was read.
 (This can be seen only during a trace.)
-.TP
-.B ENOSYS
-This
-.BR syslog ()
-system call is not available, because the kernel was compiled with the
-.BR CONFIG_PRINTK
-kernel-configuration option disabled.
 .SH "CONFORMING TO"
 This system call is Linux-specific and should not be used in programs
 intended to be portable.
diff --git a/man3/pthread_kill.3 b/man3/pthread_kill.3
index 7b04d9d22..dcbab3305 100644
--- a/man3/pthread_kill.3
+++ b/man3/pthread_kill.3
@@ -54,13 +54,13 @@ returns 0;
 on error, it returns an error number, and no signal is sent.
 .SH ERRORS
 .TP
+.B EINVAL
+An invalid signal was specified.
+.TP
 .B ESRCH
 No thread with the ID
 .I thread
 could be found.
-.TP
-.B EINVAL
-An invalid signal was specified.
 .SH CONFORMING TO
 POSIX.1-2001.
 .SH NOTES