parisc: Increase KERNEL_INITIAL_SIZE for 32-bit SMP kernels

[cascardo/linux.git] / arch / parisc / kernel / setup.c

diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index f7ea626..81d6f63 100644 (file)
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -38,6 +38,7 @@
 #include <linux/export.h>
 
 #include <asm/processor.h>
+#include <asm/sections.h>
 #include <asm/pdc.h>
 #include <asm/led.h>
 #include <asm/machdep.h>       /* for pa7300lc_init() proto */
@@ -140,6 +141,13 @@ void __init setup_arch(char **cmdline_p)
 #endif
        printk(KERN_CONT ".\n");
 
+       /*
+        * Check if initial kernel page mappings are sufficient.
+        * panic early if not, else we may access kernel functions
+        * and variables which can't be reached.
+        */
+       if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
+               panic("KERNEL_INITIAL_ORDER too small!");
 
        pdc_console_init();