Merge branch 'akpm' (patches from Andrew)

Merge second patchbomb from Andrew Morton:

 - most of the rest of MM

 - lots of misc things

 - procfs updates

 - printk feature work

 - updates to get_maintainer, MAINTAINERS, checkpatch

 - lib/ updates

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (96 commits)
  exit,stats: /* obey this comment */
  coredump: add __printf attribute to cn_*printf functions
  coredump: use from_kuid/kgid when formatting corename
  fs/reiserfs: remove unneeded cast
  NILFS2: support NFSv2 export
  fs/befs/btree.c: remove unneeded initializations
  fs/minix: remove unneeded cast
  init/do_mounts.c: add create_dev() failure log
  kasan: remove duplicate definition of the macro KASAN_FREE_PAGE
  fs/efs: femove unneeded cast
  checkpatch: emit "NOTE: <types>" message only once after multiple files
  checkpatch: emit an error when there's a diff in a changelog
  checkpatch: validate MODULE_LICENSE content
  checkpatch: add multi-line handling for PREFER_ETHER_ADDR_COPY
  checkpatch: suggest using eth_zero_addr() and eth_broadcast_addr()
  checkpatch: fix processing of MEMSET issues
  checkpatch: suggest using ether_addr_equal*()
  checkpatch: avoid NOT_UNIFIED_DIFF errors on cover-letter.patch files
  checkpatch: remove local from codespell path
  checkpatch: add --showfile to allow input via pipe to show filenames
  ...

21 files changed, 40 insertions, 181 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index a65eafb24997..bec6666a3cc4 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -499,6 +499,13 @@ config ARCH_HAS_ELF_RANDOMIZE
           - arch_mmap_rnd()
           - arch_randomize_brk()
 
+config HAVE_COPY_THREAD_TLS
+        bool
+        help
+          Architecture provides copy_thread_tls to accept tls argument via
+          normal C parameter passing, rather than extracting the syscall
+          argument from pt_regs.
+
 #
 # ABI hall of shame
 #
diff --git a/arch/arm/include/asm/hugetlb.h b/arch/arm/include/asm/hugetlb.h
index 31bb7dccb971..7d26f6c4f0f5 100644
--- a/arch/arm/include/asm/hugetlb.h
+++ b/arch/arm/include/asm/hugetlb.h
@@ -63,15 +63,6 @@ static inline pte_t huge_pte_wrprotect(pte_t pte)
         return pte_wrprotect(pte);
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
         clear_bit(PG_dcache_clean, &page->flags);
diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
index 734c17e89e94..2fd9b14ca295 100644
--- a/arch/arm64/include/asm/hugetlb.h
+++ b/arch/arm64/include/asm/hugetlb.h
@@ -96,15 +96,6 @@ static inline pte_t huge_pte_wrprotect(pte_t pte)
         return pte_wrprotect(pte);
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
         clear_bit(PG_dcache_clean, &page->flags);
diff --git a/arch/avr32/include/asm/dma-mapping.h b/arch/avr32/include/asm/dma-mapping.h
index b3d18f9f3e8d..ae7ac9205d20 100644
--- a/arch/avr32/include/asm/dma-mapping.h
+++ b/arch/avr32/include/asm/dma-mapping.h
@@ -209,17 +209,18 @@ dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
  * the same here.
  */
 static inline int
-dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
            enum dma_data_direction direction)
 {
         int i;
+        struct scatterlist *sg;
 
-        for (i = 0; i < nents; i++) {
+        for_each_sg(sglist, sg, nents, i) {
                 char *virt;
 
-                sg[i].dma_address = page_to_bus(sg_page(&sg[i])) + sg[i].offset;
-                virt = sg_virt(&sg[i]);
-                dma_cache_sync(dev, virt, sg[i].length, direction);
+                sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset;
+                virt = sg_virt(sg);
+                dma_cache_sync(dev, virt, sg->length, direction);
         }
 
         return nents;
@@ -321,14 +322,14 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
 }
 
 static inline void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist,
                        int nents, enum dma_data_direction direction)
 {
         int i;
+        struct scatterlist *sg;
 
-        for (i = 0; i < nents; i++) {
-                dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, direction);
-        }
+        for_each_sg(sglist, sg, nents, i)
+                dma_cache_sync(dev, sg_virt(sg), sg->length, direction);
 }
 
 /* Now for the API extensions over the pci_ one */
diff --git a/arch/frv/include/asm/sections.h b/arch/frv/include/asm/sections.h
index 17d0fb171bba..d03fb64e93e9 100644
--- a/arch/frv/include/asm/sections.h
+++ b/arch/frv/include/asm/sections.h
@@ -35,12 +35,6 @@ extern unsigned long __nongprelbss memory_start;
 extern unsigned long __nongprelbss memory_end;
 extern unsigned long __nongprelbss rom_length;
 
-/* determine if we're running from ROM */
-static inline int is_in_rom(unsigned long addr)
-{
-        return 0; /* default case: not in ROM */
-}
-
 #endif
 #endif
 #endif /* _ASM_SECTIONS_H */
diff --git a/arch/frv/mb93090-mb00/pci-dma-nommu.c b/arch/frv/mb93090-mb00/pci-dma-nommu.c
index b99c2a7cc7a4..8eeea0d77aad 100644
--- a/arch/frv/mb93090-mb00/pci-dma-nommu.c
+++ b/arch/frv/mb93090-mb00/pci-dma-nommu.c
@@ -119,14 +119,16 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
 
 EXPORT_SYMBOL(dma_map_single);
 
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
                enum dma_data_direction direction)
 {
         int i;
+        struct scatterlist *sg;
 
-        for (i=0; i<nents; i++)
-                frv_cache_wback_inv(sg_dma_address(&sg[i]),
-                                    sg_dma_address(&sg[i]) + sg_dma_len(&sg[i]));
+        for_each_sg(sglist, sg, nents, i) {
+                frv_cache_wback_inv(sg_dma_address(sg),
+                                    sg_dma_address(sg) + sg_dma_len(sg));
+        }
 
         BUG_ON(direction == DMA_NONE);
 
diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c
index 82478979ac9a..4d1f01dc46e5 100644
--- a/arch/frv/mb93090-mb00/pci-dma.c
+++ b/arch/frv/mb93090-mb00/pci-dma.c
@@ -50,19 +50,20 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
 
 EXPORT_SYMBOL(dma_map_single);
 
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
                enum dma_data_direction direction)
 {
         unsigned long dampr2;
         void *vaddr;
         int i;
+        struct scatterlist *sg;
 
         BUG_ON(direction == DMA_NONE);
 
         dampr2 = __get_DAMPR(2);
 
-        for (i = 0; i < nents; i++) {
-                vaddr = kmap_atomic_primary(sg_page(&sg[i]));
+        for_each_sg(sglist, sg, nents, i) {
+                vaddr = kmap_atomic_primary(sg_page(sg));
 
                 frv_dcache_writeback((unsigned long) vaddr,
                                      (unsigned long) vaddr + PAGE_SIZE);
diff --git a/arch/ia64/include/asm/hugetlb.h b/arch/ia64/include/asm/hugetlb.h
index ff1377bc02a6..ef65f026b11e 100644
--- a/arch/ia64/include/asm/hugetlb.h
+++ b/arch/ia64/include/asm/hugetlb.h
@@ -65,15 +65,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
 }
diff --git a/arch/metag/include/asm/hugetlb.h b/arch/metag/include/asm/hugetlb.h
index f730b396d79b..905ed422dbeb 100644
--- a/arch/metag/include/asm/hugetlb.h
+++ b/arch/metag/include/asm/hugetlb.h
@@ -67,15 +67,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
 }
diff --git a/arch/mips/include/asm/hugetlb.h b/arch/mips/include/asm/hugetlb.h
index 4a5bb5453408..982bc0685330 100644
--- a/arch/mips/include/asm/hugetlb.h
+++ b/arch/mips/include/asm/hugetlb.h
@@ -110,15 +110,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
 }
diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
index 4bbd3c8c2888..7eac89b9f02e 100644
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -168,15 +168,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
 }
diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h
index dfb542ade6b1..0130d0379edd 100644
--- a/arch/s390/include/asm/hugetlb.h
+++ b/arch/s390/include/asm/hugetlb.h
@@ -37,9 +37,6 @@ static inline int prepare_hugepage_range(struct file *file,
 
 #define arch_clear_hugepage_flags(page)         do { } while (0)
 
-int arch_prepare_hugepage(struct page *page);
-void arch_release_hugepage(struct page *page);
-
 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
                                   pte_t *ptep)
 {
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 53eacbd4f09b..dd345238d9a7 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -17,7 +17,10 @@
 #define PAGE_DEFAULT_ACC        0
 #define PAGE_DEFAULT_KEY        (PAGE_DEFAULT_ACC << 4)
 
-#define HPAGE_SHIFT     20
+#include <asm/setup.h>
+#ifndef __ASSEMBLY__
+
+extern int HPAGE_SHIFT;
 #define HPAGE_SIZE      (1UL << HPAGE_SHIFT)
 #define HPAGE_MASK      (~(HPAGE_SIZE - 1))
 #define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
@@ -27,9 +30,6 @@
 #define ARCH_HAS_PREPARE_HUGEPAGE
 #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
 
-#include <asm/setup.h>
-#ifndef __ASSEMBLY__
-
 static inline void storage_key_init_range(unsigned long start, unsigned long end)
 {
 #if PAGE_DEFAULT_KEY
diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c
index d7fa2f0f1425..f8498dde67b1 100644
--- a/arch/s390/kernel/compat_wrapper.c
+++ b/arch/s390/kernel/compat_wrapper.c
@@ -202,7 +202,7 @@ COMPAT_SYSCALL_WRAP1(epoll_create1, int, flags);
 COMPAT_SYSCALL_WRAP2(tkill, int, pid, int, sig);
 COMPAT_SYSCALL_WRAP3(tgkill, int, tgid, int, pid, int, sig);
 COMPAT_SYSCALL_WRAP5(perf_event_open, struct perf_event_attr __user *, attr_uptr, pid_t, pid, int, cpu, int, group_fd, unsigned long, flags);
-COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags, int __user *, parent_tidptr, int __user *, child_tidptr, int, tls_val);
+COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags, int __user *, parent_tidptr, int __user *, child_tidptr, unsigned long, tls);
 COMPAT_SYSCALL_WRAP2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags);
 COMPAT_SYSCALL_WRAP4(prlimit64, pid_t, pid, unsigned int, resource, const struct rlimit64 __user *, new_rlim, struct rlimit64 __user *, old_rlim);
 COMPAT_SYSCALL_WRAP5(name_to_handle_at, int, dfd, const char __user *, name, struct file_handle __user *, handle, int __user *, mnt_id, int, flag);
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index af4f41d52cde..73941bf42350 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -880,6 +880,8 @@ void __init setup_arch(char **cmdline_p)
          */
         setup_hwcaps();
 
+        HPAGE_SHIFT = MACHINE_HAS_HPAGE ? 20 : 0;
+
         /*
          * Create kernel page tables and switch to virtual addressing.
          */
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index c3f8e3df92ff..fb4bf2c4379e 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -86,31 +86,16 @@ static inline pte_t __pmd_to_pte(pmd_t pmd)
 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
                      pte_t *ptep, pte_t pte)
 {
-        pmd_t pmd;
+        pmd_t pmd = __pte_to_pmd(pte);
 
-        pmd = __pte_to_pmd(pte);
-        if (!MACHINE_HAS_HPAGE) {
-                /* Emulated huge ptes loose the dirty and young bit */
-                pmd_val(pmd) &= ~_SEGMENT_ENTRY_ORIGIN;
-                pmd_val(pmd) |= pte_page(pte)[1].index;
-        } else
-                pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE;
+        pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE;
         *(pmd_t *) ptep = pmd;
 }
 
 pte_t huge_ptep_get(pte_t *ptep)
 {
-        unsigned long origin;
-        pmd_t pmd;
+        pmd_t pmd = *(pmd_t *) ptep;
 
-        pmd = *(pmd_t *) ptep;
-        if (!MACHINE_HAS_HPAGE && pmd_present(pmd)) {
-                origin = pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN;
-                pmd_val(pmd) &= ~_SEGMENT_ENTRY_ORIGIN;
-                pmd_val(pmd) |= *(unsigned long *) origin;
-                /* Emulated huge ptes are young and dirty by definition */
-                pmd_val(pmd) |= _SEGMENT_ENTRY_YOUNG | _SEGMENT_ENTRY_DIRTY;
-        }
         return __pmd_to_pte(pmd);
 }
 
@@ -125,45 +110,6 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
         return pte;
 }
 
-int arch_prepare_hugepage(struct page *page)
-{
-        unsigned long addr = page_to_phys(page);
-        pte_t pte;
-        pte_t *ptep;
-        int i;
-
-        if (MACHINE_HAS_HPAGE)
-                return 0;
-
-        ptep = (pte_t *) pte_alloc_one(&init_mm, addr);
-        if (!ptep)
-                return -ENOMEM;
-
-        pte_val(pte) = addr;
-        for (i = 0; i < PTRS_PER_PTE; i++) {
-                set_pte_at(&init_mm, addr + i * PAGE_SIZE, ptep + i, pte);
-                pte_val(pte) += PAGE_SIZE;
-        }
-        page[1].index = (unsigned long) ptep;
-        return 0;
-}
-
-void arch_release_hugepage(struct page *page)
-{
-        pte_t *ptep;
-
-        if (MACHINE_HAS_HPAGE)
-                return;
-
-        ptep = (pte_t *) page[1].index;
-        if (!ptep)
-                return;
-        clear_table((unsigned long *) ptep, _PAGE_INVALID,
-                    PTRS_PER_PTE * sizeof(pte_t));
-        page_table_free(&init_mm, (unsigned long *) ptep);
-        page[1].index = 0;
-}
-
 pte_t *huge_pte_alloc(struct mm_struct *mm,
                         unsigned long addr, unsigned long sz)
 {
@@ -195,10 +141,7 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
 
 int pmd_huge(pmd_t pmd)
 {
-        if (!MACHINE_HAS_HPAGE)
-                return 0;
-
-        return !!(pmd_val(pmd) & _SEGMENT_ENTRY_LARGE);
+        return pmd_large(pmd);
 }
 
 int pud_huge(pud_t pud)
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index b33f66110ca9..33082d0d101b 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -31,6 +31,8 @@
 #define ALLOC_ORDER     2
 #define FRAG_MASK       0x03
 
+int HPAGE_SHIFT;
+
 unsigned long *crst_table_alloc(struct mm_struct *mm)
 {
         struct page *page = alloc_pages(GFP_KERNEL, ALLOC_ORDER);
diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h
index b788a9bc8918..ef489a56fcce 100644
--- a/arch/sh/include/asm/hugetlb.h
+++ b/arch/sh/include/asm/hugetlb.h
@@ -79,15 +79,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
         clear_bit(PG_dcache_clean, &page->flags);
diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h
index 3130d7636312..139e711ff80c 100644
--- a/arch/sparc/include/asm/hugetlb.h
+++ b/arch/sparc/include/asm/hugetlb.h
@@ -78,15 +78,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
 }
diff --git a/arch/tile/include/asm/hugetlb.h b/arch/tile/include/asm/hugetlb.h
index 1abd00c55236..2fac5be4de26 100644
--- a/arch/tile/include/asm/hugetlb.h
+++ b/arch/tile/include/asm/hugetlb.h
@@ -94,15 +94,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
 }
diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
index dab7a3a750bf..f8a29d2c97b0 100644
--- a/arch/x86/include/asm/hugetlb.h
+++ b/arch/x86/include/asm/hugetlb.h
@@ -80,15 +80,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
         return *ptep;
 }
 
-static inline int arch_prepare_hugepage(struct page *page)
-{
-        return 0;
-}
-
-static inline void arch_release_hugepage(struct page *page)
-{
-}
-
 static inline void arch_clear_hugepage_flags(struct page *page)
 {
 }