Merge tag 'xtensa-next-20140224' of git://github.com/czankel/xtensa-linux

Pull tensa fixes from Chris Zankel:
 "This series includes fixes for potentially serious bugs in the
  routines spilling processor registers to stack, as well as other
  issues and compiler errors and warnings.

   - allow booting xtfpga on boards with new uBoot and >128MBytes memory
   - drop nonexistent GPIO32 support from fsf variant
   - don't select USE_GENERIC_SMP_HELPERS
   - enable common clock framework support, set up ethoc clock on xtfpga
   - wire up sched_setattr and sched_getattr syscalls.
   - fix system call to spill the processor registers to stack.
   - improve kernel macro to spill the processor registers
   - export ccount_freq symbol
   - fix undefined symbol warning"

* tag 'xtensa-next-20140224' of git://github.com/czankel/xtensa-linux:
  xtensa: wire up sched_setattr and sched_getattr syscalls
  xtensa: xtfpga: set ethoc clock frequency
  xtensa: xtfpga: use common clock framework
  xtensa: support common clock framework
  xtensa: no need to select USE_GENERIC_SMP_HELPERS
  xtensa: fsf: drop nonexistent GPIO32 support
  xtensa: don't pass high memory to bootmem allocator
  xtensa: fix fast_syscall_spill_registers
  xtensa: fix fast_syscall_spill_registers
  xtensa: save current register frame in fast_syscall_spill_registers_fixup
  xtensa: introduce spill_registers_kernel macro
  xtensa: export ccount_freq
  xtensa: fix warning '"CONFIG_OF" is not defined'

1 files changed, 9 insertions, 4 deletions

diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index 479d7537a32a..aff108df92d3 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -90,7 +90,7 @@ int __init mem_reserve(unsigned long start, unsigned long end, int must_exist)
 
 
 /*
- * Initialize the bootmem system and give it all the memory we have available.
+ * Initialize the bootmem system and give it all low memory we have available.
  */
 
 void __init bootmem_init(void)
@@ -142,9 +142,14 @@ void __init bootmem_init(void)
 
 	/* Add all remaining memory pieces into the bootmem map */
 
-	for (i=0; i<sysmem.nr_banks; i++)
-		free_bootmem(sysmem.bank[i].start,
-			     sysmem.bank[i].end - sysmem.bank[i].start);
+	for (i = 0; i < sysmem.nr_banks; i++) {
+		if (sysmem.bank[i].start >> PAGE_SHIFT < max_low_pfn) {
+			unsigned long end = min(max_low_pfn << PAGE_SHIFT,
+						sysmem.bank[i].end);
+			free_bootmem(sysmem.bank[i].start,
+				     end - sysmem.bank[i].start);
+		}
+	}
 
 }