This commit updates the .clang-format rules for the perf tools.
It prioritizes Python.h sorting and expands the regex lists for C
standard library and OS specific headers.

- Prioritize Python.h by sorting it first (Priority -1), ensuring it
  is sorted before even the main header (Priority 0).
- Keep other header priorities (1 and 2) to maintain their relative
  order.
- Sanity check and complete "C Standard Library Headers" up to C23
  (added stdbit.h, stdckdint.h).
- Sanity check and complete "OS/System-Specific Headers" based on
  actual usage in tools/perf (added asm-generic, uapi, and various
  flat POSIX/system headers).

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/.clang-format | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/perf/.clang-format b/tools/perf/.clang-format
index 902b2f7456f6..e4cff363a603 100644
--- a/tools/perf/.clang-format
+++ b/tools/perf/.clang-format
@@ -2,15 +2,18 @@ BasedOnStyle: InheritParentConfig
 SortIncludes: true
 IncludeBlocks: Regroup
 IncludeCategories:
+  # Python.h must be first
+  - Regex:           '^<Python\.h>'
+    Priority:        -1
   # Implicitly the corresponding header for the C file has Priority 0
   # C Standard Library Headers
-  - Regex:           '^<(assert|complex|ctype|errno|fenv|float|inttypes|iso646|limits|locale|math|setjmp|signal|stdalign|stdarg|stdatomic|stdbool|stddef|stdint|stdio|stdlib|stdnoreturn|string|tgmath|threads|time|uchar|wchar|wctype)\.h>'
+  - Regex:           '^<(assert|complex|ctype|errno|fenv|float|inttypes|iso646|limits|locale|math|setjmp|signal|stdalign|stdarg|stdatomic|stdbit|stdbool|stdckdint|stddef|stdint|stdio|stdlib|stdnoreturn|string|tgmath|threads|time|uchar|wchar|wctype)\.h>'
     Priority:        1
   # OS/System-Specific Headers (directories)
-  - Regex:           '^<(sys|linux|asm|arpa|net|netinet|x86_64|machine)/.*>'
+  - Regex:           '^<(arpa|asm|asm-generic|linux|machine|net|netinet|sys|uapi|x86_64)/.*>'
     Priority:        2
   # OS/System-Specific Headers (POSIX/System flat headers)
-  - Regex:           '^<(unistd|pthread|fcntl|dirent|dlfcn|poll|sched|semaphore|spawn|syslog|termios|pwd|grp|netdb|sysexits|err|paths|pty|utmp|resolv|ifaddrs|elf|libelf|gelf)\.h>'
+  - Regex:           '^<(aio|byteswap|dirent|dlfcn|elf|endian|err|execinfo|fcntl|features|fnmatch|ftw|gelf|getopt|grp|ifaddrs|libelf|libgen|malloc|memory|mntent|netdb|numa|numaif|paths|poll|pthread|pty|pwd|regex|resolv|sched|semaphore|spawn|strings|syscall|sysexits|syslog|termios|unistd|utmp|x86intrin)\.h>'
     Priority:        2
   # Third-Party Library Headers
   - Regex:           '^<.*>'
-- 
2.54.0.1032.g2f8565e1d1-goog