commit 
e436d80085133858bf2613a630365e8a0459fd58
Author: Ingo Molnar <mingo@elte.hu>
Date:   Thu Jul 19 21:28:35 2007 +0200
    [PATCH] sched: implement cpu_clock(cpu) high-speed time source
broke the build of several MIPS platforms which were already using the
symbol cpu_clock for the own purposes.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 
 #include <asm/bootinfo.h>
 
 extern unsigned long bus_clock;
-extern unsigned long cpu_clock;
+extern unsigned long cpu_clock_freq;
 extern unsigned int memsize, highmemsize;
 extern int putDebugChar(unsigned char byte);
 
        l = (long)*env;
        while (l != 0) {
                parse_even_earlier(bus_clock, "busclock", l);
-               parse_even_earlier(cpu_clock, "cpuclock", l);
+               parse_even_earlier(cpu_clock_freq, "cpuclock", l);
                parse_even_earlier(memsize, "memsize", l);
                parse_even_earlier(highmemsize, "highmemsize", l);
                env++;
                memsize = 256;
 
        pr_info("busclock=%ld, cpuclock=%ld,memsize=%d,highmemsize=%d\n",
-              bus_clock, cpu_clock, memsize, highmemsize);
+              bus_clock, cpu_clock_freq, memsize, highmemsize);
 }
 
 void __init prom_free_prom_memory(void)
 
 #define PTR_PAD(p) (p)
 #endif
 
-unsigned long cpu_clock;
+unsigned long cpu_clock_freq;
 unsigned long bus_clock;
 unsigned int memsize;
 unsigned int highmemsize = 0;
 static void __init loongson2e_time_init(void)
 {
        /* setup mips r4k timer */
-       mips_hpt_frequency = cpu_clock / 2;
+       mips_hpt_frequency = cpu_clock_freq / 2;
 }
 
 static unsigned long __init mips_rtc_get_time(void)
 
 struct callvectors *debug_vectors;
 
 extern unsigned long yosemite_base;
-extern unsigned long cpu_clock;
+extern unsigned long cpu_clock_freq;
 
 const char *get_system_type(void)
 {
                                          16);
 
                if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0)
-                       cpu_clock =
+                       cpu_clock_freq =
                            simple_strtol(*env + strlen("cpuclock="), NULL,
                                          10);
 
 
        0x00, 0xe0, 0x04, 0x00, 0x00, 0x21
 };
 
-unsigned long cpu_clock;
+unsigned long cpu_clock_freq;
 unsigned long yosemite_base;
 
 static struct m48t37_rtc *m48t37_base;
 
 void yosemite_time_init(void)
 {
-       mips_hpt_frequency = cpu_clock / 2;
+       mips_hpt_frequency = cpu_clock_freq / 2;
 mips_hpt_frequency = 33000000 * 3 * 5;
 }
 
 
 
        /* clocks */
        if (txx9_master_clock) {
-               /* calculate gbus_clock and cpu_clock from master_clock */
+               /* calculate gbus_clock and cpu_clock_freq from master_clock */
                divmode = (unsigned long)tx4938_ccfgptr->ccfg & TX4938_CCFG_DIVMODE_MASK;
                switch (divmode) {
                case TX4938_CCFG_DIVMODE_8:
                if (txx9_cpu_clock == 0) {
                        txx9_cpu_clock = 300000000;     /* 300MHz */
                }
-               /* calculate gbus_clock and master_clock from cpu_clock */
+               /* calculate gbus_clock and master_clock from cpu_clock_freq */
                cpuclk = txx9_cpu_clock;
                divmode = (unsigned long)tx4938_ccfgptr->ccfg & TX4938_CCFG_DIVMODE_MASK;
                switch (divmode) {