diff options
| author | Lukas Bulwahn <lukas.bulwahn@gmail.com> | 2022-07-07 13:54:42 +0200 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-07-08 10:49:03 -0700 |
| commit | c09327d5673e5fb3695e41d2c2f05b907abb8996 (patch) | |
| tree | 9224961900827f420dad022d5ae879cedf54d2ed | |
| parent | 231af4709018a8e4f20e511da4b6506346d662d3 (diff) | |
x86: mm: refer to the intended config STRICT_DEVMEM in a comment
Commit a4866aa81251 ("mm: Tighten x86 /dev/mem with zeroing reads") adds a
comment to the function devmem_is_allowed() referring to a non-existing
config STRICT_IOMEM, whereas the comment very likely intended to refer to
the config STRICT_DEVMEM, as the commit adds some behavior for the config
STRICT_DEVMEM.
Most of the initial analysis was actually done by Dave Hansen in the
email thread below (see Link).
Refer to the intended and existing config STRICT_DEVMEM.
Link: https://lore.kernel.org/r/f9074e8d-9314-9d7d-7bf5-5b5538c8be8d@intel.com/
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220707115442.21107-1-lukas.bulwahn@gmail.com
| -rw-r--r-- | arch/x86/mm/init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index d8cfce221275..5d747a1923cb 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -846,7 +846,7 @@ int devmem_is_allowed(unsigned long pagenr) /* * This must follow RAM test, since System RAM is considered a - * restricted resource under CONFIG_STRICT_IOMEM. + * restricted resource under CONFIG_STRICT_DEVMEM. */ if (iomem_is_exclusive(pagenr << PAGE_SHIFT)) { /* Low 1MB bypasses iomem restrictions. */ |