v4.19.13 snapshot.
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
new file mode 100644
index 0000000..376ea0d
--- /dev/null
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -0,0 +1,388 @@
+
+/*
+ * PARISC specific syscalls
+ *
+ * Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
+ * Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
+ * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
+ * Copyright (C) 1999-2014 Helge Deller <deller@gmx.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/uaccess.h>
+#include <asm/elf.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/linkage.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/sched/signal.h>
+#include <linux/sched/mm.h>
+#include <linux/shm.h>
+#include <linux/syscalls.h>
+#include <linux/utsname.h>
+#include <linux/personality.h>
+#include <linux/random.h>
+
+/* we construct an artificial offset for the mapping based on the physical
+ * address of the kernel mapping variable */
+#define GET_LAST_MMAP(filp) \
+ (filp ? ((unsigned long) filp->f_mapping) >> 8 : 0UL)
+#define SET_LAST_MMAP(filp, val) \
+ { /* nothing */ }
+
+static int get_offset(unsigned int last_mmap)
+{
+ return (last_mmap & (SHM_COLOUR-1)) >> PAGE_SHIFT;
+}
+
+static unsigned long shared_align_offset(unsigned int last_mmap,
+ unsigned long pgoff)
+{
+ return (get_offset(last_mmap) + pgoff) << PAGE_SHIFT;
+}
+
+static inline unsigned long COLOR_ALIGN(unsigned long addr,
+ unsigned int last_mmap, unsigned long pgoff)
+{
+ unsigned long base = (addr+SHM_COLOUR-1) & ~(SHM_COLOUR-1);
+ unsigned long off = (SHM_COLOUR-1) &
+ (shared_align_offset(last_mmap, pgoff) << PAGE_SHIFT);
+
+ return base + off;
+}
+
+/*
+ * Top of mmap area (just below the process stack).
+ */
+
+/*
+ * When called from arch_get_unmapped_area(), rlim_stack will be NULL,
+ * indicating that "current" should be used instead of a passed-in
+ * value from the exec bprm as done with arch_pick_mmap_layout().
+ */
+static unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
+{
+ unsigned long stack_base;
+
+ /* Limit stack size - see setup_arg_pages() in fs/exec.c */
+ stack_base = rlim_stack ? rlim_stack->rlim_max
+ : rlimit_max(RLIMIT_STACK);
+ if (stack_base > STACK_SIZE_MAX)
+ stack_base = STACK_SIZE_MAX;
+
+ /* Add space for stack randomization. */
+ stack_base += (STACK_RND_MASK << PAGE_SHIFT);
+
+ return PAGE_ALIGN(STACK_TOP - stack_base);
+}
+
+
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
+ unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma, *prev;
+ unsigned long task_size = TASK_SIZE;
+ int do_color_align, last_mmap;
+ struct vm_unmapped_area_info info;
+
+ if (len > task_size)
+ return -ENOMEM;
+
+ do_color_align = 0;
+ if (filp || (flags & MAP_SHARED))
+ do_color_align = 1;
+ last_mmap = GET_LAST_MMAP(filp);
+
+ if (flags & MAP_FIXED) {
+ if ((flags & MAP_SHARED) && last_mmap &&
+ (addr - shared_align_offset(last_mmap, pgoff))
+ & (SHM_COLOUR - 1))
+ return -EINVAL;
+ goto found_addr;
+ }
+
+ if (addr) {
+ if (do_color_align && last_mmap)
+ addr = COLOR_ALIGN(addr, last_mmap, pgoff);
+ else
+ addr = PAGE_ALIGN(addr);
+
+ vma = find_vma_prev(mm, addr, &prev);
+ if (task_size - len >= addr &&
+ (!vma || addr + len <= vm_start_gap(vma)) &&
+ (!prev || addr >= vm_end_gap(prev)))
+ goto found_addr;
+ }
+
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = mm->mmap_legacy_base;
+ info.high_limit = mmap_upper_limit(NULL);
+ info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
+ info.align_offset = shared_align_offset(last_mmap, pgoff);
+ addr = vm_unmapped_area(&info);
+
+found_addr:
+ if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
+ SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
+
+ return addr;
+}
+
+unsigned long
+arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
+ const unsigned long len, const unsigned long pgoff,
+ const unsigned long flags)
+{
+ struct vm_area_struct *vma, *prev;
+ struct mm_struct *mm = current->mm;
+ unsigned long addr = addr0;
+ int do_color_align, last_mmap;
+ struct vm_unmapped_area_info info;
+
+ /* requested length too big for entire address space */
+ if (len > TASK_SIZE)
+ return -ENOMEM;
+
+ do_color_align = 0;
+ if (filp || (flags & MAP_SHARED))
+ do_color_align = 1;
+ last_mmap = GET_LAST_MMAP(filp);
+
+ if (flags & MAP_FIXED) {
+ if ((flags & MAP_SHARED) && last_mmap &&
+ (addr - shared_align_offset(last_mmap, pgoff))
+ & (SHM_COLOUR - 1))
+ return -EINVAL;
+ goto found_addr;
+ }
+
+ /* requesting a specific address */
+ if (addr) {
+ if (do_color_align && last_mmap)
+ addr = COLOR_ALIGN(addr, last_mmap, pgoff);
+ else
+ addr = PAGE_ALIGN(addr);
+
+ vma = find_vma_prev(mm, addr, &prev);
+ if (TASK_SIZE - len >= addr &&
+ (!vma || addr + len <= vm_start_gap(vma)) &&
+ (!prev || addr >= vm_end_gap(prev)))
+ goto found_addr;
+ }
+
+ info.flags = VM_UNMAPPED_AREA_TOPDOWN;
+ info.length = len;
+ info.low_limit = PAGE_SIZE;
+ info.high_limit = mm->mmap_base;
+ info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
+ info.align_offset = shared_align_offset(last_mmap, pgoff);
+ addr = vm_unmapped_area(&info);
+ if (!(addr & ~PAGE_MASK))
+ goto found_addr;
+ VM_BUG_ON(addr != -ENOMEM);
+
+ /*
+ * A failed mmap() very likely causes application failure,
+ * so fall back to the bottom-up function here. This scenario
+ * can happen with large stack limits and large mmap()
+ * allocations.
+ */
+ return arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
+
+found_addr:
+ if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
+ SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
+
+ return addr;
+}
+
+static int mmap_is_legacy(void)
+{
+ if (current->personality & ADDR_COMPAT_LAYOUT)
+ return 1;
+
+ /* parisc stack always grows up - so a unlimited stack should
+ * not be an indicator to use the legacy memory layout.
+ * if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
+ * return 1;
+ */
+
+ return sysctl_legacy_va_layout;
+}
+
+static unsigned long mmap_rnd(void)
+{
+ unsigned long rnd = 0;
+
+ if (current->flags & PF_RANDOMIZE)
+ rnd = get_random_int() & MMAP_RND_MASK;
+
+ return rnd << PAGE_SHIFT;
+}
+
+unsigned long arch_mmap_rnd(void)
+{
+ return (get_random_int() & MMAP_RND_MASK) << PAGE_SHIFT;
+}
+
+static unsigned long mmap_legacy_base(void)
+{
+ return TASK_UNMAPPED_BASE + mmap_rnd();
+}
+
+/*
+ * This function, called very early during the creation of a new
+ * process VM image, sets up which VM layout function to use:
+ */
+void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
+{
+ mm->mmap_legacy_base = mmap_legacy_base();
+ mm->mmap_base = mmap_upper_limit(rlim_stack);
+
+ if (mmap_is_legacy()) {
+ mm->mmap_base = mm->mmap_legacy_base;
+ mm->get_unmapped_area = arch_get_unmapped_area;
+ } else {
+ mm->get_unmapped_area = arch_get_unmapped_area_topdown;
+ }
+}
+
+
+asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags, unsigned long fd,
+ unsigned long pgoff)
+{
+ /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
+ we have. */
+ return ksys_mmap_pgoff(addr, len, prot, flags, fd,
+ pgoff >> (PAGE_SHIFT - 12));
+}
+
+asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags, unsigned long fd,
+ unsigned long offset)
+{
+ if (!(offset & ~PAGE_MASK)) {
+ return ksys_mmap_pgoff(addr, len, prot, flags, fd,
+ offset >> PAGE_SHIFT);
+ } else {
+ return -EINVAL;
+ }
+}
+
+/* Fucking broken ABI */
+
+#ifdef CONFIG_64BIT
+asmlinkage long parisc_truncate64(const char __user * path,
+ unsigned int high, unsigned int low)
+{
+ return ksys_truncate(path, (long)high << 32 | low);
+}
+
+asmlinkage long parisc_ftruncate64(unsigned int fd,
+ unsigned int high, unsigned int low)
+{
+ return ksys_ftruncate(fd, (long)high << 32 | low);
+}
+
+/* stubs for the benefit of the syscall_table since truncate64 and truncate
+ * are identical on LP64 */
+asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
+{
+ return ksys_truncate(path, length);
+}
+asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
+{
+ return ksys_ftruncate(fd, length);
+}
+asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+ return sys_fcntl(fd, cmd, arg);
+}
+#else
+
+asmlinkage long parisc_truncate64(const char __user * path,
+ unsigned int high, unsigned int low)
+{
+ return ksys_truncate(path, (loff_t)high << 32 | low);
+}
+
+asmlinkage long parisc_ftruncate64(unsigned int fd,
+ unsigned int high, unsigned int low)
+{
+ return sys_ftruncate64(fd, (loff_t)high << 32 | low);
+}
+#endif
+
+asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
+ unsigned int high, unsigned int low)
+{
+ return ksys_pread64(fd, buf, count, (loff_t)high << 32 | low);
+}
+
+asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
+ size_t count, unsigned int high, unsigned int low)
+{
+ return ksys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
+}
+
+asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
+ size_t count)
+{
+ return ksys_readahead(fd, (loff_t)high << 32 | low, count);
+}
+
+asmlinkage long parisc_fadvise64_64(int fd,
+ unsigned int high_off, unsigned int low_off,
+ unsigned int high_len, unsigned int low_len, int advice)
+{
+ return ksys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
+ (loff_t)high_len << 32 | low_len, advice);
+}
+
+asmlinkage long parisc_sync_file_range(int fd,
+ u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
+ unsigned int flags)
+{
+ return ksys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
+ (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
+}
+
+asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
+ u32 lenhi, u32 lenlo)
+{
+ return ksys_fallocate(fd, mode, ((u64)offhi << 32) | offlo,
+ ((u64)lenhi << 32) | lenlo);
+}
+
+long parisc_personality(unsigned long personality)
+{
+ long err;
+
+ if (personality(current->personality) == PER_LINUX32
+ && personality(personality) == PER_LINUX)
+ personality = (personality & ~PER_MASK) | PER_LINUX32;
+
+ err = sys_personality(personality);
+ if (personality(err) == PER_LINUX32)
+ err = (err & ~PER_MASK) | PER_LINUX;
+
+ return err;
+}