diff options
| -rw-r--r-- | arch/x86/entry/vdso/vma.c | 3 | ||||
| -rw-r--r-- | arch/x86/include/asm/vdso/vsyscall.h | 10 | ||||
| -rw-r--r-- | drivers/char/random.c | 5 |
3 files changed, 13 insertions, 5 deletions
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c index 6d83ceb7f1ba..b8fed8b8b9cc 100644 --- a/arch/x86/entry/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c @@ -38,6 +38,9 @@ struct vdso_data *arch_get_vdso_data(void *vvar_page) } #undef EMIT_VVAR +DEFINE_VVAR(struct vdso_data, _vdso_data); +DEFINE_VVAR_SINGLE(struct vdso_rng_data, _vdso_rng_data); + unsigned int vclocks_used __read_mostly; #if defined(CONFIG_X86_64) diff --git a/arch/x86/include/asm/vdso/vsyscall.h b/arch/x86/include/asm/vdso/vsyscall.h index 972415a8be31..67fedf1698b5 100644 --- a/arch/x86/include/asm/vdso/vsyscall.h +++ b/arch/x86/include/asm/vdso/vsyscall.h @@ -9,9 +9,6 @@ #include <asm/vgtod.h> #include <asm/vvar.h> -DEFINE_VVAR(struct vdso_data, _vdso_data); -DEFINE_VVAR_SINGLE(struct vdso_rng_data, _vdso_rng_data); - /* * Update the vDSO data page to keep in sync with kernel timekeeping. */ @@ -22,6 +19,13 @@ struct vdso_data *__x86_get_k_vdso_data(void) } #define __arch_get_k_vdso_data __x86_get_k_vdso_data +static __always_inline +struct vdso_rng_data *__x86_get_k_vdso_rng_data(void) +{ + return &_vdso_rng_data; +} +#define __arch_get_k_vdso_rng_data __x86_get_k_vdso_rng_data + /* The asm-generic header needs to be included after the definitions above */ #include <asm-generic/vdso/vsyscall.h> diff --git a/drivers/char/random.c b/drivers/char/random.c index c12f906e05d6..23ee76bbb4aa 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -59,6 +59,7 @@ #ifdef CONFIG_VDSO_GETRANDOM #include <vdso/getrandom.h> #include <vdso/datapage.h> +#include <vdso/vsyscall.h> #endif #include <asm/archrandom.h> #include <asm/processor.h> @@ -289,7 +290,7 @@ static void crng_reseed(struct work_struct *work) * because the vDSO side only checks whether the value changed, without * actually using or interpreting the value. */ - smp_store_release((unsigned long *)&_vdso_rng_data.generation, next_gen + 1); + smp_store_release((unsigned long *)&__arch_get_k_vdso_rng_data()->generation, next_gen + 1); #endif if (!static_branch_likely(&crng_is_ready)) crng_init = CRNG_READY; @@ -742,7 +743,7 @@ static void __cold _credit_init_bits(size_t bits) queue_work(system_unbound_wq, &set_ready); atomic_notifier_call_chain(&random_ready_notifier, 0, NULL); #ifdef CONFIG_VDSO_GETRANDOM - WRITE_ONCE(_vdso_rng_data.is_ready, true); + WRITE_ONCE(__arch_get_k_vdso_rng_data()->is_ready, true); #endif wake_up_interruptible(&crng_init_wait); kill_fasync(&fasync, SIGIO, POLL_IN); |