Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (202 commits)
  [POWERPC] Fix compile breakage for 64-bit UP configs
  [POWERPC] Define copy_siginfo_from_user32
  [POWERPC] Add compat handler for PTRACE_GETSIGINFO
  [POWERPC] i2c: Fix build breakage introduced by OF helpers
  [POWERPC] Optimize fls64() on 64-bit processors
  [POWERPC] irqtrace support for 64-bit powerpc
  [POWERPC] Stacktrace support for lockdep
  [POWERPC] Move stackframe definitions to common header
  [POWERPC] Fix device-tree locking vs. interrupts
  [POWERPC] Make pci_bus_to_host()'s struct pci_bus * argument const
  [POWERPC] Remove unused __max_memory variable
  [POWERPC] Simplify xics direct/lpar irq_host setup
  [POWERPC] Use pseries_setup_i8259_cascade() in pseries_mpic_init_IRQ()
  [POWERPC] Turn xics_setup_8259_cascade() into a generic pseries_setup_i8259_cascade()
  [POWERPC] Move xics_setup_8259_cascade() into platforms/pseries/setup.c
  [POWERPC] Use asm-generic/bitops/find.h in bitops.h
  [POWERPC] 83xx: mpc8315 - fix USB UTMI Host setup
  [POWERPC] 85xx: Fix the size of qe muram for MPC8568E
  [POWERPC] 86xx: mpc86xx_hpcn - Temporarily accept old dts node identifier.
  [POWERPC] 86xx: mark functions static, other minor cleanups
  ...

1 files changed, 31 insertions, 1 deletions

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index a83dfa3cf40..2b5a399f6fa 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -31,6 +31,7 @@
 #include <linux/cache.h>
 #include <linux/init.h>
 #include <linux/signal.h>
+#include <linux/lmb.h>
 
 #include <asm/processor.h>
 #include <asm/pgtable.h>
@@ -41,7 +42,7 @@
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/machdep.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/abs_addr.h>
 #include <asm/tlbflush.h>
 #include <asm/io.h>
@@ -191,6 +192,29 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
 	return ret < 0 ? ret : 0;
 }
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+static int htab_remove_mapping(unsigned long vstart, unsigned long vend,
+		      int psize, int ssize)
+{
+	unsigned long vaddr;
+	unsigned int step, shift;
+
+	shift = mmu_psize_defs[psize].shift;
+	step = 1 << shift;
+
+	if (!ppc_md.hpte_removebolted) {
+		printk(KERN_WARNING "Platform doesn't implement "
+				"hpte_removebolted\n");
+		return -EINVAL;
+	}
+
+	for (vaddr = vstart; vaddr < vend; vaddr += step)
+		ppc_md.hpte_removebolted(vaddr, psize, ssize);
+
+	return 0;
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
 static int __init htab_dt_scan_seg_sizes(unsigned long node,
 					 const char *uname, int depth,
 					 void *data)
@@ -434,6 +458,12 @@ void create_section_mapping(unsigned long start, unsigned long end)
 			_PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | PP_RWXX,
 			mmu_linear_psize, mmu_kernel_ssize));
 }
+
+int remove_section_mapping(unsigned long start, unsigned long end)
+{
+	return htab_remove_mapping(start, end, mmu_linear_psize,
+			mmu_kernel_ssize);
+}
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 static inline void make_bl(unsigned int *insn_addr, void *func)