Merge tag 'pull-tcg-20260112' of https://gitlab.com/rth7680/qemu into staging

tcg/riscv: Fix TCG_REG_TMP0 clobber in tcg_gen_dup{m,i}
tcg/optimize: Fixes for o_mask and a_mask
linux-user: Correction to HWCAP2 accessor
linux-user: Fixes for mremap
linux-user: Implement epoll_pwait2 syscall
meson: disable libatomic with GCC >= 16

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* tag 'pull-tcg-20260112' of https://gitlab.com/rth7680/qemu:
  meson: disable libatomic with GCC >= 16
  linux-user: implement epoll_pwait2 syscall
  linux-user: cleanup epoll_pwait ifdeff'ery
  tests: add tcg coverage for fixed mremap bugs
  linux-user: fix reserved_va page leak in do_munmap
  linux-user: fix mremap errors for invalid ranges
  linux-user: fix mremap unmapping adjacent region
  linux-user/elfload.c: Correction to HWCAP2 accessor
  linux-user: allow null `pathname` for statx()/fstatat()
  tcg/riscv: Fix TCG_REG_TMP0 clobber in tcg_gen_dup{m,i}
  tcg/optimize: Do use affected bits
  tcg/optimize: Fix a_mask computation for orc
  tcg/optimize: Save o_mask in fold_masks_zosa_int

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>