diff --git a/man2/syscalls.2 b/man2/syscalls.2
index e84cf80d6..193cd98e4 100644
--- a/man2/syscalls.2
+++ b/man2/syscalls.2
@@ -186,11 +186,6 @@ Deprecated (does nothing)
 .br
 since 2.6
 T}
-\fBbfin_spinlock\fP(2)	2.6.22	T{
-Blackfin only (port removed
-.br
-in Linux 4.17)
-T}
 \fBbind\fP(2)	2.0	See notes on \fBsocketcall\fP(2)
 \fBbpf\fP(2)	3.18
 \fBbrk\fP(2)	1.0
@@ -235,11 +230,6 @@ T}
 .\" T}
 .\" 867e359b97c970a60626d5d76bbe2a8fadbf38fb
 .\" bb9d812643d8a121df7d614a2b9c60193a92deb0
-\fBcmpxchg_badaddr\fP(2)	2.6.36	T{
-Tile only (port removed
-.br
-in Linux 4.17)
-T}
 \fBconnect\fP(2)	2.0	See notes on \fBsocketcall\fP(2)
 \fBcopy_file_range\fP(2)	4.5
 \fBcreat\fP(2)	1.0
@@ -247,11 +237,6 @@ T}
 \fBdelete_module\fP(2)	1.0
 .\" 1394f03221790a988afc3e4b3cb79f2e477246a9
 .\" 4ba66a9760722ccbb691b8f7116cad2f791cca7b
-\fBdma_memcpy\fP(2)	2.6.22	T{
-Blackfin only (port removed
-.br
-in Linux 4.17)
-T}
 \fBdup\fP(2)	1.0
 \fBdup2\fP(2)	1.0
 \fBdup3\fP(2)	2.6.27
@@ -437,26 +422,6 @@ T}
 \fBmemory_ordering\fP(2)	2.2	SPARC64 only
 .\" 26025bbfbba33a9425be1b89eccb4664ea4c17b6
 .\" bb6fb6dfcc17cddac11ac295861f7608194447a7
-\fBmetag_get_tls\fP(2)	3.9	T{
-Metag only (port removed
-.br
-in Linux 4.17)
-T}
-\fBmetag_set_fpu_flags\fP(2)	3.9	T{
-Metag only (port removed
-.br
-in Linux 4.17)
-T}
-\fBmetag_set_tls\fP(2)	3.9	T{
-Metag only (port removed
-.br
-in Linux 4.17)
-T}
-\fBmetag_setglobalbit\fP(2)	3.9	T{
-Metag only (port removed
-.br
-in Linux 4.17)
-T}
 \fBmembarrier\fP(2)	3.17
 \fBmemfd_create\fP(2)	3.17
 \fBmigrate_pages\fP(2)	2.6.16
@@ -552,15 +517,6 @@ T}
 \fBpoll\fP(2)	2.0.36; 2.2
 \fBppoll\fP(2)	2.6.16
 \fBprctl\fP(2)	2.2
-\fBpread\fP(2)		T{
-Used for \fBpread64\fP(2) on AVR32
-.br
-(port removed in Linux 4.12)
-.br
-and Blackfin (port removed
-.br
-in Linux 4.17)
-T}
 \fBpread64\fP(2)		T{
 Added as "pread" in 2.2;
 .br
@@ -574,17 +530,6 @@ T}
 \fBpselect6\fP(2)	2.6.16
 .\" Implements \fBpselect\fP(2)
 \fBptrace\fP(2)	1.0
-\fBpwrite\fP(2)		T{
-Used for \fBpwrite64\fP(2)
-.br
-on AVR32
-(port removed
-.br
-in Linux 4.12)
-and Blackfin
-.br
-(port removed in Linux 4.17)
-T}
 \fBpwrite64\fP(2)		T{
 Added as "pwrite" in 2.2;
 .br
@@ -744,16 +689,6 @@ T}
 \fBsplice\fP(2)	2.6.17
 \fBspu_create\fP(2)	2.6.16	PowerPC/PowerPC64 only
 \fBspu_run\fP(2)	2.6.16	PowerPC/PowerPC64 only
-\fBsram_alloc\fP(2)	2.6.22	T{
-Blackfin (port removed
-.br
-in Linux 4.17)
-T}
-\fBsram_free\fP(2)	2.6.22	T{
-Blackfin (port removed
-.br
-in Linux 4.17)
-T}
 \fBssetmask\fP(2)	1.0
 \fBstat\fP(2)	1.0
 \fBstat64\fP(2)	2.4
@@ -903,6 +838,71 @@ There was briefly
 .BR set_zone_reclaim (2),
 added in Linux 2.6.13, and removed in 2.6.16;
 this system call was never available to user space.
+.\"
+.SS System calls on removed ports
+Some system calls only ever existed on Linux architectures that have
+since been removed from the kernel:
+.TP
+AVR32 (port removed in Linux 4.12)
+.RS
+.PD 0
+.IP * 2
+.BR pread (2)
+.IP *
+.BR pwrite (2)
+.PD
+.RE
+.TP
+Blackfin (port removed in Linux 4.17)
+.RS
+.PD 0
+.IP * 2
+.BR bfin_spinlock (2)
+(added in Linux 2.6.22)
+.IP *
+.BR dma_memcpy (2)
+(added in Linux 2.6.22)
+.IP *
+.BR pread (2)
+(added in Linux 2.6.22)
+.IP *
+.BR pwrite (2)
+(added in Linux 2.6.22)
+.IP *
+.BR sram_alloc (2)
+(added in Linux 2.6.22)
+.IP *
+.BR sram_free (2)
+(added in Linux 2.6.22)
+.PD
+.RE
+.TP
+Metag (port removed in Linux 4.17)
+.RS
+.PD 0
+.IP * 2
+.BR metag_get_tls (2)
+(add in Linux 3.9)
+.IP *
+.BR metag_set_fpu_flags (2)
+(add in Linux 3.9)
+.IP *
+.BR metag_set_tls (2)
+(add in Linux 3.9)
+.IP *
+.BR metag_setglobalbit (2)
+(add in Linux 3.9)
+.PD
+.RE
+.TP
+Tile (port removed in Linux 4.17)
+.RS
+.PD 0
+.IP * 2
+.BR cmpxchg_badaddr (2)
+(added in Linux 2.6.36)
+.PD
+.RE
 .SH NOTES
 Roughly speaking, the code belonging to the system call
 with number __NR_xxx defined in