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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-28 13:27:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-28 13:27:46 -0700 |
| commit | 5f498328a91b59841557b8c4e8f0360e509dd454 (patch) | |
| tree | b8c7905d08a1ab4b993aa30c1a75cd9b8ac4bd8c /arch/x86 | |
| parent | e98e8864b0b553389bbb7d2ed197729a434ba0f0 (diff) | |
| parent | 314a1e1eabea5b86532e90e0d4e217fa88471e3b (diff) | |
| download | linux-5f498328a91b59841557b8c4e8f0360e509dd454.tar.bz2 | |
Merge tag 'x86-mm-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm update from Ingo Molnar:
"Do not create the x86/init_pkru debugfs file if the CPU doesn't
support PKRU"
* tag 'x86-mm-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pkeys: Skip 'init_pkru' debugfs file creation when pkeys not supported
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/mm/pkeys.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/mm/pkeys.c b/arch/x86/mm/pkeys.c index a2332eef66e9..4a67b922bce1 100644 --- a/arch/x86/mm/pkeys.c +++ b/arch/x86/mm/pkeys.c @@ -192,6 +192,10 @@ static const struct file_operations fops_init_pkru = { static int __init create_init_pkru_value(void) { + /* Do not expose the file if pkeys are not supported. */ + if (!cpu_feature_enabled(X86_FEATURE_OSPKE)) + return 0; + debugfs_create_file("init_pkru", S_IRUSR | S_IWUSR, arch_debugfs_dir, NULL, &fops_init_pkru); return 0; |