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| author | Nikolay Borisov <nik.borisov@suse.com> | 2023-10-30 15:17:28 +0100 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-01-29 17:37:47 +0100 |
| commit | 955997e880175b00161efb83b1b282849ff412d3 (patch) | |
| tree | ba35b5e4f09c69268ab0743f124f2e981f1c239d /arch | |
| parent | Linux 6.8-rc2 (diff) | |
| download | linux-955997e880175b00161efb83b1b282849ff412d3.tar.xz linux-955997e880175b00161efb83b1b282849ff412d3.zip | |
KVM: x86: Use mutex guards to eliminate __kvm_x86_vendor_init()
Use the recently introduced guard(mutex) infrastructure acquire and
automatically release vendor_module_lock when the guard goes out of scope.
Drop the inner __kvm_x86_vendor_init(), its sole purpose was to simplify
releasing vendor_module_lock in error paths.
No functional change intended.
Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20231030141728.1406118-1-nik.borisov@suse.com
[sean: rewrite changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 363b1c080205..709844fcd521 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -9632,11 +9632,13 @@ static void kvm_x86_check_cpu_compat(void *ret) *(int *)ret = kvm_x86_check_processor_compatibility(); } -static int __kvm_x86_vendor_init(struct kvm_x86_init_ops *ops) +int kvm_x86_vendor_init(struct kvm_x86_init_ops *ops) { u64 host_pat; int r, cpu; + guard(mutex)(&vendor_module_lock); + if (kvm_x86_ops.hardware_enable) { pr_err("already loaded vendor module '%s'\n", kvm_x86_ops.name); return -EEXIST; @@ -9766,17 +9768,6 @@ out_free_x86_emulator_cache: kmem_cache_destroy(x86_emulator_cache); return r; } - -int kvm_x86_vendor_init(struct kvm_x86_init_ops *ops) -{ - int r; - - mutex_lock(&vendor_module_lock); - r = __kvm_x86_vendor_init(ops); - mutex_unlock(&vendor_module_lock); - - return r; -} EXPORT_SYMBOL_GPL(kvm_x86_vendor_init); void kvm_x86_vendor_exit(void) |