From 34ff636f322c6d5e4f0a52338fa63a7dff09a495 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Sat, 18 Jul 2026 13:15:36 -0400 Subject: scftorture: Count single_rpc offline failures in statistics output scf_torture_stats_print() aggregates each invoker thread's counters into a local scf_statistics structure before printing, but the n_single_rpc_ofl field is missing from the aggregation loop. As a result, the "single_rpc_ofl" value printed in the statistics line is always zero, even when smp_call_function_single() invocations for the RPC test have failed due to offline CPUs and been counted by the invoker threads. Add the missing accumulation so that the printed value reflects the actual counts. Signed-off-by: Joel Fernandes Signed-off-by: Paul E. McKenney --- include/asm-generic/uaccess.h | 234 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 234 insertions(+) create mode 100644 include/asm-generic/uaccess.h (limited to 'include/asm-generic/uaccess.h') diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h new file mode 100644 index 000000000..4569045e7 --- /dev/null +++ b/include/asm-generic/uaccess.h @@ -0,0 +1,234 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_GENERIC_UACCESS_H +#define __ASM_GENERIC_UACCESS_H + +/* + * User space memory access functions, these should work + * on any machine that has kernel and user data in the same + * address space, e.g. all NOMMU machines. + */ +#include +#include + +#ifdef CONFIG_UACCESS_MEMCPY +#include + +static __always_inline int +__get_user_fn(size_t size, const void __user *from, void *to) +{ + BUILD_BUG_ON(!__builtin_constant_p(size)); + + switch (size) { + case 1: + *(u8 *)to = *((u8 __force *)from); + return 0; + case 2: + *(u16 *)to = get_unaligned((u16 __force *)from); + return 0; + case 4: + *(u32 *)to = get_unaligned((u32 __force *)from); + return 0; + case 8: + *(u64 *)to = get_unaligned((u64 __force *)from); + return 0; + default: + BUILD_BUG(); + return 0; + } + +} +#define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k) + +static __always_inline int +__put_user_fn(size_t size, void __user *to, void *from) +{ + BUILD_BUG_ON(!__builtin_constant_p(size)); + + switch (size) { + case 1: + *(u8 __force *)to = *(u8 *)from; + return 0; + case 2: + put_unaligned(*(u16 *)from, (u16 __force *)to); + return 0; + case 4: + put_unaligned(*(u32 *)from, (u32 __force *)to); + return 0; + case 8: + put_unaligned(*(u64 *)from, (u64 __force *)to); + return 0; + default: + BUILD_BUG(); + return 0; + } +} +#define __put_user_fn(sz, u, k) __put_user_fn(sz, u, k) + +#define __get_kernel_nofault(dst, src, type, err_label) \ +do { \ + *((type *)dst) = get_unaligned((type *)(src)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +#define __put_kernel_nofault(dst, src, type, err_label) \ +do { \ + put_unaligned(*((type *)src), (type *)(dst)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +static inline __must_check unsigned long +raw_copy_from_user(void *to, const void __user * from, unsigned long n) +{ + memcpy(to, (const void __force *)from, n); + return 0; +} + +static inline __must_check unsigned long +raw_copy_to_user(void __user *to, const void *from, unsigned long n) +{ + memcpy((void __force *)to, from, n); + return 0; +} +#define INLINE_COPY_USER +#endif /* CONFIG_UACCESS_MEMCPY */ + +/* + * These are the main single-value transfer routines. They automatically + * use the right size if we just have the right pointer type. + * This version just falls back to copy_{from,to}_user, which should + * provide a fast-path for small values. + */ +#define __put_user(x, ptr) \ +({ \ + __typeof__(*(ptr)) __x = (x); \ + int __pu_err = -EFAULT; \ + __chk_user_ptr(ptr); \ + switch (sizeof (*(ptr))) { \ + case 1: \ + case 2: \ + case 4: \ + case 8: \ + __pu_err = __put_user_fn(sizeof (*(ptr)), \ + ptr, &__x); \ + break; \ + default: \ + __put_user_bad(); \ + break; \ + } \ + __pu_err; \ +}) + +#define put_user(x, ptr) \ +({ \ + void __user *__p = (ptr); \ + might_fault(); \ + access_ok(__p, sizeof(*ptr)) ? \ + __put_user((x), ((__typeof__(*(ptr)) __user *)__p)) : \ + -EFAULT; \ +}) + +#ifndef __put_user_fn + +static inline int __put_user_fn(size_t size, void __user *ptr, void *x) +{ + return unlikely(raw_copy_to_user(ptr, x, size)) ? -EFAULT : 0; +} + +#define __put_user_fn(sz, u, k) __put_user_fn(sz, u, k) + +#endif + +extern int __put_user_bad(void) __attribute__((noreturn)); + +#define __get_user(x, ptr) \ +({ \ + int __gu_err = -EFAULT; \ + __chk_user_ptr(ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: { \ + unsigned char __x = 0; \ + __gu_err = __get_user_fn(sizeof (*(ptr)), \ + ptr, &__x); \ + (x) = *(__force __typeof__(*(ptr)) *) &__x; \ + break; \ + }; \ + case 2: { \ + unsigned short __x = 0; \ + __gu_err = __get_user_fn(sizeof (*(ptr)), \ + ptr, &__x); \ + (x) = *(__force __typeof__(*(ptr)) *) &__x; \ + break; \ + }; \ + case 4: { \ + unsigned int __x = 0; \ + __gu_err = __get_user_fn(sizeof (*(ptr)), \ + ptr, &__x); \ + (x) = *(__force __typeof__(*(ptr)) *) &__x; \ + break; \ + }; \ + case 8: { \ + unsigned long long __x = 0; \ + __gu_err = __get_user_fn(sizeof (*(ptr)), \ + ptr, &__x); \ + (x) = *(__force __typeof__(*(ptr)) *) &__x; \ + break; \ + }; \ + default: \ + __get_user_bad(); \ + break; \ + } \ + __gu_err; \ +}) + +#define get_user(x, ptr) \ +({ \ + const void __user *__p = (ptr); \ + might_fault(); \ + access_ok(__p, sizeof(*ptr)) ? \ + __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\ + ((x) = (__typeof__(*(ptr)))0,-EFAULT); \ +}) + +#ifndef __get_user_fn +static inline int __get_user_fn(size_t size, const void __user *ptr, void *x) +{ + return unlikely(raw_copy_from_user(x, ptr, size)) ? -EFAULT : 0; +} + +#define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k) + +#endif + +extern int __get_user_bad(void) __attribute__((noreturn)); + +/* + * Zero Userspace + */ +#ifndef __clear_user +static inline __must_check unsigned long +__clear_user(void __user *to, unsigned long n) +{ + memset((void __force *)to, 0, n); + return 0; +} +#endif + +static inline __must_check unsigned long +clear_user(void __user *to, unsigned long n) +{ + might_fault(); + if (!access_ok(to, n)) + return n; + + return __clear_user(to, n); +} + +#include + +__must_check long strncpy_from_user(char *dst, const char __user *src, + long count); +__must_check long strnlen_user(const char __user *src, long n); + +#endif /* __ASM_GENERIC_UACCESS_H */ -- cgit v1.3.1