[glibc] misc: Remove sstk from the autogenerated system call list

[Florian Weimer <fw@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6d246cb852d3c5ab721dc583112a59ac47dc374e

commit 6d246cb852d3c5ab721dc583112a59ac47dc374e
Author: Florian Weimer <fweimer@redhat.com>
Date:   Tue Apr 28 12:10:32 2020 +0200

    misc: Remove sstk from the autogenerated system call list
    
    This change should not have an effect because the system call was
    never defined.  Also add the misssing attribute_compat_text_section
    attribute to the sstk function (a minor optimization).  Also update the
    NEWS file to document the change.
    
    Fixes commit 9cc93ba0973ad04ee26c515a1552afb85e73c6ba
    ("misc: Turn sstk into a compat symbol").

Diff:
---
 NEWS                       | 4 ++++
 misc/sstk.c                | 2 +-
 sysdeps/unix/syscalls.list | 1 -
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/NEWS b/NEWS
index 0e627b3405..f58436c91a 100644
--- a/NEWS
+++ b/NEWS
@@ -26,6 +26,10 @@ Deprecated and removed features, and other changes affecting compatibility:
   but always fails with ENOSYS.  This reflects the removal of the system
   call from all architectures, starting with Linux 5.5.
 
+* The sstk function is no longer available to newly linked binaries.
+  Its implementation always returned with a failure, and the function
+  was not declared in any header file.
+
 Changes to build and runtime requirements:
 
   [Add changes to build and runtime requirements here]
diff --git a/misc/sstk.c b/misc/sstk.c
index 0a2a967917..dda6f7b426 100644
--- a/misc/sstk.c
+++ b/misc/sstk.c
@@ -19,7 +19,7 @@
 #include <shlib-compat.h>
 
 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_32)
-void *
+void * attribute_compat_text_section
 sstk (int increment)
 {
   __set_errno (ENOSYS);
diff --git a/sysdeps/unix/syscalls.list b/sysdeps/unix/syscalls.list
index 01c4a0e6b1..e8f8718b04 100644
--- a/sysdeps/unix/syscalls.list
+++ b/sysdeps/unix/syscalls.list
@@ -78,7 +78,6 @@ sigaction	-	sigaction	i:ipp	__sigaction	sigaction
 sigsuspend	-	sigsuspend	Ci:p	sigsuspend
 socket		-	socket		i:iii	__socket	socket
 socketpair	-	socketpair	i:iiif	socketpair
-sstk		-	sstk		b:i	sstk
 statfs		-	statfs		i:sp	__statfs	statfs
 swapoff		-	swapoff		i:s	swapoff
 swapon		-	swapon		i:s	swapon