(intel_check_word): Early exit if we know level3 does not exist.

(__sysconf): Add comment.

diff --git a/sysdeps/unix/sysv/linux/i386/sysconf.c b/sysdeps/unix/sysv/linux/i386/sysconf.c
index 067c752..54e7840 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/sysconf.c
+++ b/sysdeps/unix/sysv/linux/i386/sysconf.c
@@ -143,7 +143,13 @@ intel_check_word (int name, unsigned int value, bool *has_level_2,
       unsigned int byte = value & 0xff;
 
       if (byte == 0x40)
-       *no_level_2_or_3 = true;
+       {
+         *no_level_2_or_3 = true;
+
+         if (folded_name == _SC_LEVEL3_CACHE_SIZE)
+           /* No need to look further.  */
+           break;
+       }
       else
        {
          struct intel_02_cache_info *found;
@@ -290,6 +296,7 @@ __sysconf (int name)
                : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
                : "0" (0));
 
+  /* This spells out "GenuineIntel".  */
   if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
     return handle_intel (name, eax);
   // XXX Fill in more vendors.