diff --git a/glibc-RHEL-57587.patch b/glibc-RHEL-57587.patch
new file mode 100644
index 0000000..8295e9f
--- /dev/null
+++ b/glibc-RHEL-57587.patch
@@ -0,0 +1,65 @@
+commit f451a02a8c3c0bc6b41dac5e9e6ad49dd1c9529c
+Author: Joseph Myers <josmyers@redhat.com>
+Date:   Mon May 12 14:56:07 2025 +0000
+
+    Document all CLOCK_* values
+    
+    The manual documents CLOCK_REALTIME and CLOCK_MONOTONIC but not other
+    CLOCK_* values.  Add documentation of the POSIX clocks
+    CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID, along with a
+    reference to the Linux man pages for the semantics of the
+    Linux-specific clocks supported (as with some other functionality
+    coming direct from the Linux kernel where the man pages can be
+    considered the main documentation).
+    
+    Note: CLOCK_MONOTONIC_RAW, CLOCK_REALTIME_COARSE and
+    CLOCK_MONOTONIC_COARSE are also defined in the toplevel bits/time.h,
+    as used for Hurd.  Nevertheless, I see no sign that the Hurd code in
+    glibc actually has any support for those clocks, so I think it is
+    correct to document them as Linux-specific (and to refer only to the
+    Linux man pages for their semantics).
+    
+    Reviewed-by: Carlos O'Donell <carlos@redhat.com>
+
+diff --git a/manual/time.texi b/manual/time.texi
+index c0e645b15ce44788..8e072c7e375a750e 100644
+--- a/manual/time.texi
++++ b/manual/time.texi
+@@ -528,7 +528,36 @@ Therefore, @code{CLOCK_MONOTONIC} cannot be used to measure
+ absolute time, only elapsed time.
+ @end deftypevr
+ 
+-Systems may support more than just these two POSIX clocks.
++The following clocks are defined by POSIX, but may not be supported by
++all POSIX systems:
++
++@deftypevr Macro clockid_t CLOCK_PROCESS_CPUTIME_ID
++@standards{POSIX.1, time.h}
++This POSIX clock measures the amount of CPU time used by the calling
++process.
++@end deftypevr
++
++@deftypevr Macro clockid_t CLOCK_THREAD_CPUTIME_ID
++@standards{POSIX.1, time.h}
++This POSIX clock measures the amount of CPU time used by the calling
++thread.
++@end deftypevr
++
++The following clocks are Linux extensions:
++
++@deftypevr Macro clockid_t CLOCK_MONOTONIC_RAW
++@deftypevrx Macro clockid_t CLOCK_REALTIME_COARSE
++@deftypevrx Macro clockid_t CLOCK_MONOTONIC_COARSE
++@deftypevrx Macro clockid_t CLOCK_BOOTTIME
++@deftypevrx Macro clockid_t CLOCK_REALTIME_ALARM
++@deftypevrx Macro clockid_t CLOCK_BOOTTIME_ALARM
++@deftypevrx Macro clockid_t CLOCK_TAI
++@standards{Linux, time.h}
++For details of these clocks, see the manual page
++@manpageurl{clock_gettime,2}.
++@end deftypevr
++
++Systems may support additional clocks beyond those listed here.
+ 
+ @deftypefun int clock_gettime (clockid_t @var{clock}, struct timespec *@var{ts})
+ @standards{POSIX.1, time.h}
diff --git a/glibc.spec b/glibc.spec
index 7f9782f..0973704 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -157,7 +157,7 @@ end \
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 197%{?dist}
+Release: 198%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -1215,6 +1215,7 @@ Patch906: glibc-RHEL-92697-6.patch
 Patch907: glibc-RHEL-92697-8.patch
 Patch908: glibc-RHEL-92697-9.patch
 Patch909: glibc-RHEL-92095.patch
+Patch910: glibc-RHEL-57587.patch
 
 ##############################################################################
 # Continued list of core "glibc" package information:
@@ -3208,6 +3209,9 @@ update_gconv_modules_cache ()
 %endif
 
 %changelog
+* Mon May 26 2025 Frédéric Bérat <fberat@redhat.com> - 2.34-198
+- Document additional CLOCK_* values in glibc manual (RHEL-57587)
+
 * Thu May 22 2025 Frédéric Bérat <fberat@redhat.com> - 2.34-197
 - Prevent `,ccs=` from being treated as individual mode flags in `fopen` calls
   (RHEL-92095)