Commit 8a6b94032e00 for kernel

commit 8a6b94032e0077ae15b21e7b42a9599bdc18ea22
Merge: 1c241cba196d 33c9da5dfb18
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed Apr 2 12:25:03 2025 -0700

    Merge tag 'uml-for-linux-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

    Pull UML updates from Johannes Berg:

     - proper nofault accesses and read-only rodata

     - hostfs fix for host inode number reuse

     - fixes for host errno handling

     - various cleanups/small fixes

    * tag 'uml-for-linux-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux:
      um: Rewrite the sigio workaround based on epoll and tgkill
      um: Prohibit the VM_CLONE flag in run_helper_thread()
      um: Switch to the pthread-based helper in sigio workaround
      um: ubd: Switch to the pthread-based helper
      um: Add pthread-based helper support
      um: x86: clean up elf specific definitions
      um: Store full CSGSFS and SS register from mcontext
      um: virt-pci: Refactor virtio_pcidev into its own module
      um: work around sched_yield not yielding in time-travel mode
      um/locking: Remove semicolon from "lock" prefix
      um: Update min_low_pfn to match changes in uml_reserved
      um: use str_yes_no() to remove hardcoded "yes" and "no"
      um: hostfs: avoid issues on inode number reuse by host
      um: Allocate vdso page pointer statically
      um: remove copy_from_kernel_nofault_allowed
      um: mark rodata read-only and implement _nofault accesses
      um: Pass the correct Rust target and options with gcc

diff --cc arch/um/kernel/mem.c
index 379f33a1babf,61b5a5ede01c..76bec7de81b5
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@@ -66,11 -68,11 +68,12 @@@ void __init arch_mm_preinit(void
  	map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
  	memblock_free((void *)brk_end, uml_reserved - brk_end);
  	uml_reserved = brk_end;
+ 	min_low_pfn = PFN_UP(__pa(uml_reserved));
 -
 -	/* this will put all low memory onto the freelists */
 -	memblock_free_all();
  	max_pfn = max_low_pfn;
 +}
 +
 +void __init mem_init(void)
 +{
  	kmalloc_ok = 1;
  }