The patch titled Subject: scripts/gdb/vmalloc: disable on no-MMU has been added to the -mm mm-hotfixes-unstable branch. Its filename is scripts-gdb-vmalloc-disable-on-no-mmu.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Ben Wolsieffer ben.wolsieffer@hefring.com Subject: scripts/gdb/vmalloc: disable on no-MMU Date: Tue, 31 Oct 2023 16:22:36 -0400

vmap_area does not exist on no-MMU, therefore the GDB scripts fail to load:

Traceback (most recent call last): File "<...>/vmlinux-gdb.py", line 51, in <module> import linux.vmalloc File "<...>/scripts/gdb/linux/vmalloc.py", line 14, in <module> vmap_area_ptr_type = vmap_area_type.get_type().pointer() ^^^^^^^^^^^^^^^^^^^^^^^^^ File "<...>/scripts/gdb/linux/utils.py", line 28, in get_type self._type = gdb.lookup_type(self._name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ gdb.error: No struct type named vmap_area.

To fix this, disable the command and add an informative error message if CONFIG_MMU is not defined, following the example of lx-slabinfo.

Link: https://lkml.kernel.org/r/20231031202235.2655333-2-ben.wolsieffer@hefring.co... Fixes: 852622bf3616 ("scripts/gdb/vmalloc: add vmallocinfo support") Signed-off-by: Ben Wolsieffer ben.wolsieffer@hefring.com Cc: Jan Kiszka jan.kiszka@siemens.com Cc: Kieran Bingham kbingham@kernel.org Cc: Kuan-Ying Lee Kuan-Ying.Lee@mediatek.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

scripts/gdb/linux/constants.py.in | 1 + scripts/gdb/linux/vmalloc.py | 8 ++++++-- 2 files changed, 7 insertions(+), 2 deletions(-)

--- a/scripts/gdb/linux/constants.py.in~scripts-gdb-vmalloc-disable-on-no-mmu +++ a/scripts/gdb/linux/constants.py.in @@ -157,3 +157,4 @@ LX_CONFIG(CONFIG_STACKDEPOT) LX_CONFIG(CONFIG_PAGE_OWNER) LX_CONFIG(CONFIG_SLUB_DEBUG) LX_CONFIG(CONFIG_SLAB_FREELIST_HARDENED) +LX_CONFIG(CONFIG_MMU) --- a/scripts/gdb/linux/vmalloc.py~scripts-gdb-vmalloc-disable-on-no-mmu +++ a/scripts/gdb/linux/vmalloc.py @@ -10,8 +10,9 @@ import gdb import re from linux import lists, utils, stackdepot, constants, mm

-vmap_area_type = utils.CachedType('struct vmap_area') -vmap_area_ptr_type = vmap_area_type.get_type().pointer() +if constants.LX_CONFIG_MMU: + vmap_area_type = utils.CachedType('struct vmap_area') + vmap_area_ptr_type = vmap_area_type.get_type().pointer()

def is_vmalloc_addr(x): pg_ops = mm.page_ops().ops @@ -25,6 +26,9 @@ class LxVmallocInfo(gdb.Command): super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)

def invoke(self, arg, from_tty): + if not constants.LX_CONFIG_MMU: + raise gdb.GdbError("Requires MMU support") + vmap_area_list = gdb.parse_and_eval('vmap_area_list') for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"): if not vmap_area['vm']: _

Patches currently in -mm which might be from ben.wolsieffer@hefring.com are

scripts-gdb-vmalloc-disable-on-no-mmu.patch