more cmain -> bootmain

bootmain.c

@@ -2,7 +2,7 @@
 // 
 // The BIOS loads boot sector (bootasm.S) from sector 1 of the disk
 // into memory and executes it.  The boot sector puts the processor
-// in 32-bit mode and calls cmain below, which loads an ELF kernel
+// in 32-bit mode and calls bootmain below, which loads an ELF kernel
 // image from the disk starting at sector 2 and then jumps to the
 // kernel entry routine.
 

bootother.S

@@ -16,7 +16,7 @@
 # This code is identical to bootasm.S except:
 #   - it does not need to enable A20
 #   - it uses the address at start-4 for the %esp
-#   - it jumps to the address at start-8 instead of calling cmain
+#   - it jumps to the address at start-8 instead of calling bootmain
 
 .set PROT_MODE_CSEG, 0x8         # kernel code segment selector
 .set PROT_MODE_DSEG, 0x10        # kernel data segment selector