On 22/07/19 09:33, Yi Wang wrote:
> We got these coccinelle warning:
> ./arch/x86/kvm/debugfs.c:23:0-23: WARNING: vcpu_timer_advance_ns_fops
> should be defined with DEFINE_DEBUGFS_ATTRIBUTE
> ./arch/x86/kvm/debugfs.c:32:0-23: WARNING: vcpu_tsc_offset_fops should
> be defined with DEFINE_DEBUGFS_ATTRIBUTE
> ./arch/x86/kvm/debugfs.c:41:0-23: WARNING: vcpu_tsc_scaling_fops should
> be defined with DEFINE_DEBUGFS_ATTRIBUTE
> ./arch/x86/kvm/debugfs.c:49:0-23: WARNING: vcpu_tsc_scaling_frac_fops
> should be defined with DEFINE_DEBUGFS_ATTRIBUTE
>
> Use DEFINE_DEBUGFS_ATTRIBUTE() rather than DEFINE_SIMPLE_ATTRIBUTE()
> to fix this.
>
> Signed-off-by: Yi Wang <wang.yi59@xxxxxxxxxx>
It sucks though that you have to use a function with "unsafe" in the name.
Greg, is the patch doing the right thing?
Paolo
> ---
> arch/x86/kvm/debugfs.c | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/arch/x86/kvm/debugfs.c b/arch/x86/kvm/debugfs.c
> index 329361b..24016fb 100644
> --- a/arch/x86/kvm/debugfs.c
> +++ b/arch/x86/kvm/debugfs.c
> @@ -20,7 +20,7 @@ static int vcpu_get_timer_advance_ns(void *data, u64 *val)
> return 0;
> }
>
> -DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
> +DEFINE_DEBUGFS_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
>
> static int vcpu_get_tsc_offset(void *data, u64 *val)
> {
> @@ -29,7 +29,7 @@ static int vcpu_get_tsc_offset(void *data, u64 *val)
> return 0;
> }
>
> -DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
> +DEFINE_DEBUGFS_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
>
> static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
> {
> @@ -38,7 +38,7 @@ static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
> return 0;
> }
>
> -DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
> +DEFINE_DEBUGFS_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
>
> static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
> {
> @@ -46,20 +46,20 @@ static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
> return 0;
> }
>
> -DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
> +DEFINE_DEBUGFS_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
>
> int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
> {
> struct dentry *ret;
>
> - ret = debugfs_create_file("tsc-offset", 0444,
> + ret = debugfs_create_file_unsafe("tsc-offset", 0444,
> vcpu->debugfs_dentry,
> vcpu, &vcpu_tsc_offset_fops);
> if (!ret)
> return -ENOMEM;
>
> if (lapic_in_kernel(vcpu)) {
> - ret = debugfs_create_file("lapic_timer_advance_ns", 0444,
> + ret = debugfs_create_file_unsafe("lapic_timer_advance_ns", 0444,
> vcpu->debugfs_dentry,
> vcpu, &vcpu_timer_advance_ns_fops);
> if (!ret)
> @@ -67,12 +67,12 @@ int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
> }
>
> if (kvm_has_tsc_control) {
> - ret = debugfs_create_file("tsc-scaling-ratio", 0444,
> + ret = debugfs_create_file_unsafe("tsc-scaling-ratio", 0444,
> vcpu->debugfs_dentry,
> vcpu, &vcpu_tsc_scaling_fops);
> if (!ret)
> return -ENOMEM;
> - ret = debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
> + ret = debugfs_create_file_unsafe("tsc-scaling-ratio-frac-bits", 0444,
> vcpu->debugfs_dentry,
> vcpu, &vcpu_tsc_scaling_frac_fops);
> if (!ret)
>
