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-rw-r--r--arch/um/drivers/mconsole_kern.c2
-rw-r--r--arch/um/include/asm/mmu_context.h5
-rw-r--r--arch/um/include/asm/pgtable-3level.h4
-rw-r--r--arch/um/include/asm/pgtable.h69
-rw-r--r--arch/um/kernel/maccess.c10
-rw-r--r--arch/um/kernel/mem.c10
-rw-r--r--arch/um/kernel/process.c1
-rw-r--r--arch/um/kernel/skas/mmu.c3
-rw-r--r--arch/um/kernel/skas/uaccess.c1
-rw-r--r--arch/um/kernel/sysrq.c23
-rw-r--r--arch/um/kernel/tlb.c5
-rw-r--r--arch/um/kernel/trap.c15
-rw-r--r--arch/um/kernel/um_arch.c1
13 files changed, 43 insertions, 106 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 30575bd92975..a2e680f7d39f 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -648,7 +648,7 @@ static void stack_proc(void *arg)
{
struct task_struct *task = arg;
- show_stack(task, NULL);
+ show_stack(task, NULL, KERN_INFO);
}
/*
diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h
index b4deb1bfbb68..17ddd4edf875 100644
--- a/arch/um/include/asm/mmu_context.h
+++ b/arch/um/include/asm/mmu_context.h
@@ -8,6 +8,7 @@
#include <linux/sched.h>
#include <linux/mm_types.h>
+#include <linux/mmap_lock.h>
#include <asm/mmu.h>
@@ -47,9 +48,9 @@ static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
* when the new ->mm is used for the first time.
*/
__switch_mm(&new->context.id);
- down_write_nested(&new->mmap_sem, 1);
+ mmap_write_lock_nested(new, SINGLE_DEPTH_NESTING);
uml_setup_stubs(new);
- up_write(&new->mmap_sem);
+ mmap_write_unlock(new);
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
diff --git a/arch/um/include/asm/pgtable-3level.h b/arch/um/include/asm/pgtable-3level.h
index 8a3b689e0f86..36f452957cef 100644
--- a/arch/um/include/asm/pgtable-3level.h
+++ b/arch/um/include/asm/pgtable-3level.h
@@ -89,10 +89,6 @@ static inline void pud_clear (pud_t *pud)
#define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
-/* Find an entry in the second-level page table.. */
-#define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \
- pmd_index(address))
-
static inline unsigned long pte_pfn(pte_t pte)
{
return phys_to_pfn(pte_val(pte));
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index b5ddf5d98bd5..def376194dce 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -1,5 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0 */
-/*
+/*
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright 2003 PathScale, Inc.
* Derived from include/asm-i386/pgtable.h
@@ -131,7 +131,7 @@ static inline int pte_none(pte_t pte)
* Undefined behaviour if not..
*/
static inline int pte_read(pte_t pte)
-{
+{
return((pte_get_bits(pte, _PAGE_USER)) &&
!(pte_get_bits(pte, _PAGE_PROTNONE)));
}
@@ -163,7 +163,7 @@ static inline int pte_newpage(pte_t pte)
}
static inline int pte_newprot(pte_t pte)
-{
+{
return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT)));
}
@@ -185,31 +185,31 @@ static inline pte_t pte_mkclean(pte_t pte)
return(pte);
}
-static inline pte_t pte_mkold(pte_t pte)
-{
+static inline pte_t pte_mkold(pte_t pte)
+{
pte_clear_bits(pte, _PAGE_ACCESSED);
return(pte);
}
static inline pte_t pte_wrprotect(pte_t pte)
-{
+{
if (likely(pte_get_bits(pte, _PAGE_RW)))
pte_clear_bits(pte, _PAGE_RW);
else
return pte;
- return(pte_mknewprot(pte));
+ return(pte_mknewprot(pte));
}
static inline pte_t pte_mkread(pte_t pte)
-{
+{
if (unlikely(pte_get_bits(pte, _PAGE_USER)))
return pte;
pte_set_bits(pte, _PAGE_USER);
- return(pte_mknewprot(pte));
+ return(pte_mknewprot(pte));
}
static inline pte_t pte_mkdirty(pte_t pte)
-{
+{
pte_set_bits(pte, _PAGE_DIRTY);
return(pte);
}
@@ -220,20 +220,20 @@ static inline pte_t pte_mkyoung(pte_t pte)
return(pte);
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite(pte_t pte)
{
if (unlikely(pte_get_bits(pte, _PAGE_RW)))
return pte;
pte_set_bits(pte, _PAGE_RW);
- return(pte_mknewprot(pte));
+ return(pte_mknewprot(pte));
}
-static inline pte_t pte_mkuptodate(pte_t pte)
+static inline pte_t pte_mkuptodate(pte_t pte)
{
pte_clear_bits(pte, _PAGE_NEWPAGE);
if(pte_present(pte))
pte_clear_bits(pte, _PAGE_NEWPROT);
- return(pte);
+ return(pte);
}
static inline pte_t pte_mknewpage(pte_t pte)
@@ -288,53 +288,16 @@ static inline int pte_same(pte_t pte_a, pte_t pte_b)
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
pte_set_val(pte, (pte_val(pte) & _PAGE_CHG_MASK), newprot);
- return pte;
+ return pte;
}
/*
- * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
- *
- * this macro returns the index of the entry in the pgd page which would
- * control the given virtual address
- */
-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
-
-/*
- * pgd_offset() returns a (pgd_t *)
- * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
- */
-#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
-
-/*
- * a shortcut which implies the use of the kernel's pgd, instead
- * of a process's
- */
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
-
-/*
* the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
*
* this macro returns the index of the entry in the pmd page which would
* control the given virtual address
*/
#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
-#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
-
-#define pmd_page_vaddr(pmd) \
- ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
-
-/*
- * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
- *
- * this macro returns the index of the entry in the pte page which would
- * control the given virtual address
- */
-#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
-#define pte_offset_kernel(dir, address) \
- ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
-#define pte_offset_map(dir, address) \
- ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_unmap(pte) do { } while (0)
struct mm_struct;
extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
@@ -353,8 +316,6 @@ extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
#define kern_addr_valid(addr) (1)
-#include <asm-generic/pgtable.h>
-
/* Clear a kernel PTE and flush it from the TLB */
#define kpte_clear_flush(ptep, vaddr) \
do { \
diff --git a/arch/um/kernel/maccess.c b/arch/um/kernel/maccess.c
index 67b2e0fa92bb..e929c0966696 100644
--- a/arch/um/kernel/maccess.c
+++ b/arch/um/kernel/maccess.c
@@ -7,15 +7,13 @@
#include <linux/kernel.h>
#include <os.h>
-long probe_kernel_read(void *dst, const void *src, size_t size)
+bool probe_kernel_read_allowed(const void *src, size_t size)
{
void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
if ((unsigned long)src < PAGE_SIZE || size <= 0)
- return -EFAULT;
-
+ return false;
if (os_mincore(psrc, size + src - psrc) <= 0)
- return -EFAULT;
-
- return __probe_kernel_read(dst, src, size);
+ return false;
+ return true;
}
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 401b22f14743..c2ff76c8981e 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -125,10 +125,6 @@ static void __init fixaddr_user_init( void)
{
#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
long size = FIXADDR_USER_END - FIXADDR_USER_START;
- pgd_t *pgd;
- p4d_t *p4d;
- pud_t *pud;
- pmd_t *pmd;
pte_t *pte;
phys_t p;
unsigned long v, vaddr = FIXADDR_USER_START;
@@ -146,11 +142,7 @@ static void __init fixaddr_user_init( void)
p = __pa(v);
for ( ; size > 0; size -= PAGE_SIZE, vaddr += PAGE_SIZE,
p += PAGE_SIZE) {
- pgd = swapper_pg_dir + pgd_index(vaddr);
- p4d = p4d_offset(pgd, vaddr);
- pud = pud_offset(p4d, vaddr);
- pmd = pmd_offset(pud, vaddr);
- pte = pte_offset_kernel(pmd, vaddr);
+ pte = virt_to_kpte(vaddr);
pte_set_val(*pte, p, PAGE_READONLY);
}
#endif
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index cbe33af2a880..e3a2cf92a373 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -25,7 +25,6 @@
#include <linux/threads.h>
#include <linux/tracehook.h>
#include <asm/current.h>
-#include <asm/pgtable.h>
#include <asm/mmu_context.h>
#include <linux/uaccess.h>
#include <as-layout.h>
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 3f0d9a573fd6..d9961163da66 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -9,7 +9,6 @@
#include <linux/slab.h>
#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
#include <asm/sections.h>
#include <as-layout.h>
#include <os.h>
@@ -115,7 +114,7 @@ void uml_setup_stubs(struct mm_struct *mm)
mm->context.stub_pages[0] = virt_to_page(__syscall_stub_start);
mm->context.stub_pages[1] = virt_to_page(mm->context.id.stack);
- /* dup_mmap already holds mmap_sem */
+ /* dup_mmap already holds mmap_lock */
err = install_special_mapping(mm, STUB_START, STUB_END - STUB_START,
VM_READ | VM_MAYREAD | VM_EXEC |
VM_MAYEXEC | VM_DONTCOPY | VM_PFNMAP,
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index d617f8dc9c19..2dec915abe6f 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -10,7 +10,6 @@
#include <linux/sched.h>
#include <asm/current.h>
#include <asm/page.h>
-#include <asm/pgtable.h>
#include <kern_util.h>
#include <os.h>
diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c
index c71b5ef7ea8c..acbc879d2773 100644
--- a/arch/um/kernel/sysrq.c
+++ b/arch/um/kernel/sysrq.c
@@ -17,7 +17,9 @@
static void _print_addr(void *data, unsigned long address, int reliable)
{
- pr_info(" [<%08lx>] %s%pS\n", address, reliable ? "" : "? ",
+ const char *loglvl = data;
+
+ printk("%s [<%08lx>] %s%pS\n", loglvl, address, reliable ? "" : "? ",
(void *)address);
}
@@ -25,9 +27,9 @@ static const struct stacktrace_ops stackops = {
.address = _print_addr
};
-void show_stack(struct task_struct *task, unsigned long *stack)
+void show_stack(struct task_struct *task, unsigned long *stack,
+ const char *loglvl)
{
- unsigned long *sp = stack;
struct pt_regs *segv_regs = current->thread.segv_regs;
int i;
@@ -38,20 +40,19 @@ void show_stack(struct task_struct *task, unsigned long *stack)
}
if (!stack)
- sp = get_stack_pointer(task, segv_regs);
+ stack = get_stack_pointer(task, segv_regs);
- pr_info("Stack:\n");
- stack = sp;
+ printk("%sStack:\n", loglvl);
for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
if (kstack_end(stack))
break;
if (i && ((i % STACKSLOTS_PER_LINE) == 0))
- pr_cont("\n");
+ printk("%s\n", loglvl);
pr_cont(" %08lx", *stack++);
}
- pr_cont("\n");
+ printk("%s\n", loglvl);
- pr_info("Call Trace:\n");
- dump_trace(current, &stackops, NULL);
- pr_info("\n");
+ printk("%sCall Trace:\n", loglvl);
+ dump_trace(current, &stackops, (void *)loglvl);
+ printk("%s\n", loglvl);
}
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 80a358c6d652..61776790cd67 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -7,7 +7,6 @@
#include <linux/module.h>
#include <linux/sched/signal.h>
-#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <as-layout.h>
#include <mem_user.h>
@@ -349,8 +348,8 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
if (ret) {
printk(KERN_ERR "fix_range_common: failed, killing current "
"process: %d\n", task_tgid_vnr(current));
- /* We are under mmap_sem, release it such that current can terminate */
- up_write(&current->mm->mmap_sem);
+ /* We are under mmap_lock, release it such that current can terminate */
+ mmap_write_unlock(current->mm);
force_sig(SIGKILL);
do_signal(&current->thread.regs);
}
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 8f18cf56b3dd..2b3afa354a90 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -10,7 +10,6 @@
#include <linux/uaccess.h>
#include <linux/sched/debug.h>
#include <asm/current.h>
-#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <arch.h>
#include <as-layout.h>
@@ -27,9 +26,6 @@ int handle_page_fault(unsigned long address, unsigned long ip,
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
- pgd_t *pgd;
- p4d_t *p4d;
- pud_t *pud;
pmd_t *pmd;
pte_t *pte;
int err = -EFAULT;
@@ -47,7 +43,7 @@ int handle_page_fault(unsigned long address, unsigned long ip,
if (is_user)
flags |= FAULT_FLAG_USER;
retry:
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
vma = find_vma(mm, address);
if (!vma)
goto out;
@@ -103,10 +99,7 @@ good_area:
}
}
- pgd = pgd_offset(mm, address);
- p4d = p4d_offset(pgd, address);
- pud = pud_offset(p4d, address);
- pmd = pmd_offset(pud, address);
+ pmd = pmd_off(mm, address);
pte = pte_offset_kernel(pmd, address);
} while (!pte_present(*pte));
err = 0;
@@ -123,7 +116,7 @@ good_area:
#endif
flush_tlb_page(vma, address);
out:
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
out_nosemaphore:
return err;
@@ -132,7 +125,7 @@ out_of_memory:
* We ran out of memory, call the OOM killer, and return the userspace
* (which will retry the fault, or kill us if we got oom-killed).
*/
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
if (!is_user)
goto out_nosemaphore;
pagefault_out_of_memory();
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 375ab720e4aa..00141e70de56 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -14,7 +14,6 @@
#include <linux/sched/task.h>
#include <linux/kmsg_dump.h>
-#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/setup.h>
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-01 09:39:48 +0000