Various pages: Normalize NOTES about nonexistent glibc wrappers

See previous commit.

This commit normalizes texts under sections other than SYNOPSIS
(most of them in NOTES).

Signed-off-by: Ganimedes Colomar <gacoan.linux@gmail.com>
Cowritten-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/add_key.2

@@ -216,7 +216,7 @@ This system call first appeared in Linux 2.6.10.
 .SH CONFORMING TO
 This system call is a nonstandard Linux extension.
 .SH NOTES
-No wrapper for this system call is provided in glibc.
+Glibc does not provide a wrapper for this system call.
 A wrapper is provided in the
 .IR libkeyutils
 package.

man2/arch_prctl.2

@@ -177,10 +177,8 @@ and
 in the same thread is dangerous, as they may overwrite each other's
 TLS entries.
 .PP
-As of version 2.7, glibc provides no prototype for
-.BR arch_prctl ().
-You have to declare it yourself for now.
-This may be fixed in future glibc versions.
+Glibc does not provide a wrapper for this system call; call it using
+.BR syscall (2).
 .PP
 .I FS
 may be already used by the threading library.

man2/getdents.2

@@ -211,13 +211,13 @@ SVr4.
 Library support for
 .BR getdents64 ()
 was added in glibc 2.30;
-there is no glibc wrapper for
-.BR getdents ().
-Calling
+Glibc does not provide a wrapper for
+.BR getdents ();
+call
 .BR getdents ()
 (or
 .BR getdents64 ()
-on earlier glibc versions) requires the use of
+on earlier glibc versions) using
 .BR syscall (2).
 In that case you will need to define the
 .I linux_dirent

man2/io_cancel.2

@@ -68,7 +68,7 @@ The asynchronous I/O system calls first appeared in Linux 2.5.
 is Linux-specific and should not be used
 in programs that are intended to be portable.
 .SH NOTES
-Glibc does not provide a wrapper function for this system call.
+Glibc does not provide a wrapper for this system call.
 You could invoke it using
 .BR syscall (2).
 But instead, you probably want to use the

man2/io_destroy.2

@@ -57,7 +57,7 @@ The asynchronous I/O system calls first appeared in Linux 2.5.
 is Linux-specific and should not be used in programs
 that are intended to be portable.
 .SH NOTES
-Glibc does not provide a wrapper function for this system call.
+Glibc does not provide a wrapper for this system call.
 You could invoke it using
 .BR syscall (2).
 But instead, you probably want to use the

man2/io_getevents.2

@@ -94,7 +94,7 @@ The asynchronous I/O system calls first appeared in Linux 2.5.
 is Linux-specific and should not be used in
 programs that are intended to be portable.
 .SH NOTES
-Glibc does not provide a wrapper function for this system call.
+Glibc does not provide a wrapper for this system call.
 You could invoke it using
 .BR syscall (2).
 But instead, you probably want to use the

man2/io_setup.2

@@ -72,7 +72,7 @@ The asynchronous I/O system calls first appeared in Linux 2.5.
 is Linux-specific and should not be used in programs
 that are intended to be portable.
 .SH NOTES
-Glibc does not provide a wrapper function for this system call.
+Glibc does not provide a wrapper for this system call.
 You could invoke it using
 .BR syscall (2).
 But instead, you probably want to use the

man2/io_submit.2

@@ -247,7 +247,7 @@ The asynchronous I/O system calls first appeared in Linux 2.5.
 is Linux-specific and should not be used in
 programs that are intended to be portable.
 .SH NOTES
-Glibc does not provide a wrapper function for this system call.
+Glibc does not provide a wrapper for this system call.
 You could invoke it using
 .BR syscall (2).
 But instead, you probably want to use the

man2/kexec_load.2

@@ -335,8 +335,7 @@ system call first appeared in Linux 3.17.
 .SH CONFORMING TO
 These system calls are Linux-specific.
 .SH NOTES
-Currently, there is no glibc support for these system calls.
-Call them using
+Glibc does not provide a wrapper for this system call; call it using
 .BR syscall (2).
 .SH SEE ALSO
 .BR reboot (2),

man2/keyctl.2

@@ -1953,7 +1953,7 @@ This system call first appeared in Linux 2.6.10.
 .SH CONFORMING TO
 This system call is a nonstandard Linux extension.
 .SH NOTES
-No wrapper for this system call is provided in glibc.
+Glibc does not provide a wrapper for this system call.
 A wrapper is provided in the
 .IR libkeyutils
 library.

man2/pidfd_getfd.2

@@ -121,7 +121,7 @@ first appeared in Linux 5.6.
 .BR pidfd_getfd ()
 is Linux specific.
 .SH NOTES
-Currently, there is no glibc wrapper for this system call; call it using
+Glibc does not provide a wrapper for this system call; call it using
 .BR syscall (2).
 .PP
 For a description of PID file descriptors, see

man2/pidfd_open.2

@@ -91,7 +91,7 @@ first appeared in Linux 5.3.
 .BR pidfd_open ()
 is Linux specific.
 .SH NOTES
-Currently, there is no glibc wrapper for this system call; call it using
+Glibc does not provide a wrapper for this system call; call it using
 .BR syscall (2).
 .PP
 The following code sequence can be used to obtain a file descriptor

man2/pidfd_send_signal.2

@@ -135,7 +135,7 @@ first appeared in Linux 5.1.
 .BR pidfd_send_signal ()
 is Linux specific.
 .SH NOTES
-Currently, there is no glibc wrapper for this system call; call it using
+Glibc does not provide a wrapper for this system call; call it using
 .BR syscall (2).
 .\"
 .SS PID file descriptors

man2/request_key.2

@@ -439,7 +439,7 @@ in Linux 2.6.13.
 .SH CONFORMING TO
 This system call is a nonstandard Linux extension.
 .SH NOTES
-No wrapper for this system call is provided in glibc.
+Glibc does not provide a wrapper for this system call.
 A wrapper is provided in the
 .IR libkeyutils
 package.

man2/s390_guarded_storage.2

@@ -144,9 +144,8 @@ This Linux-specific system call is available only on the s390 architecture.
 .PP
 The guarded storage facility is available beginning with System z14.
 .SH NOTES
-Glibc does not provide a wrapper for this system call, use
+Glibc does not provide a wrapper for this system call; call it using
 .BR syscall (2)
-to call it.
 .PP
 The description of the guarded storage facility along with related
 instructions and Guarded Storage Control Block and

man2/s390_pci_mmio_write.2

@@ -103,8 +103,7 @@ These system calls are available since Linux 3.19.
 This Linux-specific system call is available only on the s390 architecture.
 The required PCI support is available beginning with System z EC12.
 .SH NOTES
-Glibc does not provide a wrapper for this system call, use
+Glibc does not provide wrappers for these system calls; call them using
 .BR syscall (2)
-to call it.
 .SH SEE ALSO
 .BR syscall (2)

man2/s390_runtime_instr.2

@@ -97,9 +97,8 @@ This Linux-specific system call is available only on the s390 architecture.
 The run-time instrumentation facility is available
 beginning with System z EC12.
 .SH NOTES
-Glibc does not provide a wrapper for this system call, use
+Glibc does not provide a wrapper for this system call; call it using
 .BR syscall (2)
-to call it.
 .PP
 The
 .I asm/runtime_instr.h

man2/s390_sthyi.2

@@ -126,9 +126,8 @@ This system call is available since Linux 4.15.
 .SH CONFORMING TO
 This Linux-specific system call is available only on the s390 architecture.
 .SH NOTES
-Glibc does not provide a wrapper for this system call, use
+Glibc does not provide a wrapper for this system call; call it using
 .BR syscall (2)
-to call it.
 .PP
 For details of the STHYI instruction, see
 .UR https://www.ibm.com\:/support\:/knowledgecenter\:/SSB27U_6.3.0\:/com.ibm.zvm.v630.hcpb4\:/hcpb4sth.htm

man2/seccomp.2

@@ -858,6 +858,9 @@ Tile (since Linux 4.3)
 PA-RISC (since Linux 4.6)
 .\" User mode Linux since Linux 4.6
 .PD
+.PP
+Glibc does not provide a wrapper for this system call; call it using
+.BR syscall (2).
 .\"
 .SS Caveats
 There are various subtleties to consider when applying seccomp filters

man2/sysctl.2

@@ -120,8 +120,7 @@ Note that on older kernels where this system call still exists,
 it is available only if the kernel was configured with the
 .B CONFIG_SYSCTL_SYSCALL
 option.
-Furthermore,
-glibc does not provide a wrapper for this system call,
+Furthermore, glibc does not provide a wrapper for this system call,
 necessitating the use of
 .BR syscall (2).
 .SH BUGS