Merge tag 'uml-for-linus-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

Pull UML updates from Richard Weinberger:

 - Add support for rust (yay!)

 - Add support for LTO

 - Add platform bus support to virtio-pci

 - Various virtio fixes

 - Coding style, spelling cleanups

* tag 'uml-for-linus-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (27 commits)
  Documentation: rust: Fix arch support table
  uml: vector: Remove unused definitions VECTOR_{WRITE,HEADERS}
  um: virt-pci: properly remove PCI device from bus
  um: virtio_uml: move device breaking into workqueue
  um: virtio_uml: mark device as unregistered when breaking it
  um: virtio_uml: free command if adding to virtqueue failed
  UML: define RUNTIME_DISCARD_EXIT
  virt-pci: add platform bus support
  um-virt-pci: Make max delay configurable
  um: virt-pci: implement pcibios_get_phb_of_node()
  um: Support LTO
  um: put power options in a menu
  um: Use CFLAGS_vmlinux
  um: Prevent building modules incompatible with MODVERSIONS
  um: Avoid pcap multiple definition errors
  um: Make the definition of cpu_data more compatible
  x86: um: vdso: Add '%rcx' and '%r11' to the syscall clobber list
  rust: arch/um: Add support for CONFIG_RUST under x86_64 UML
  rust: arch/um: Disable FP/SIMD instruction to match x86
  rust: arch/um: Use 'pie' relocation mode under UML
  ...

4 files changed, 8 insertions, 6 deletions

diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index 58938d75871a..827a0d3fa589 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -29,8 +29,8 @@ void flush_thread(void)
 
 	ret = unmap(&current->mm->context.id, 0, TASK_SIZE, 1, &data);
 	if (ret) {
-		printk(KERN_ERR "flush_thread - clearing address space failed, "
-		       "err = %d\n", ret);
+		printk(KERN_ERR "%s - clearing address space failed, err = %d\n",
+		       __func__, ret);
 		force_sig(SIGKILL);
 	}
 	get_safe_registers(current_pt_regs()->regs.gp,
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index ad449173a1a1..7d050ab0f78a 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -314,8 +314,8 @@ static inline int update_p4d_range(pgd_t *pgd, unsigned long addr,
 	return ret;
 }
 
-void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
-		      unsigned long end_addr, int force)
+static void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
+			     unsigned long end_addr, int force)
 {
 	pgd_t *pgd;
 	struct host_vm_change hvc;
@@ -597,6 +597,8 @@ void force_flush_all(void)
 	struct vm_area_struct *vma;
 	VMA_ITERATOR(vmi, mm, 0);
 
+	mmap_read_lock(mm);
 	for_each_vma(vmi, vma)
 		fix_range(mm, vma->vm_start, vma->vm_end, 1);
+	mmap_read_unlock(mm);
 }
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 786b44dc20c9..8dcda617b8bf 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -96,7 +96,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 
 static void *c_start(struct seq_file *m, loff_t *pos)
 {
-	return *pos < nr_cpu_ids ? cpu_data + *pos : NULL;
+	return *pos < nr_cpu_ids ? &boot_cpu_data + *pos : NULL;
 }
 
 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
diff --git a/arch/um/kernel/vmlinux.lds.S b/arch/um/kernel/vmlinux.lds.S
index 16e49bfa2b42..53d719c04ba9 100644
--- a/arch/um/kernel/vmlinux.lds.S
+++ b/arch/um/kernel/vmlinux.lds.S
@@ -1,4 +1,4 @@
-
+#define RUNTIME_DISCARD_EXIT
 KERNEL_STACK_SIZE = 4096 * (1 << CONFIG_KERNEL_STACK_ORDER);
 
 #ifdef CONFIG_LD_SCRIPT_STATIC