diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/compiler_attributes.h | 17 | ||||
| -rw-r--r-- | include/linux/export.h | 10 | ||||
| -rw-r--r-- | include/linux/leds.h | 5 | ||||
| -rw-r--r-- | include/linux/memcontrol.h | 29 | ||||
| -rw-r--r-- | include/linux/slab.h | 4 | ||||
| -rw-r--r-- | include/linux/string.h | 21 | ||||
| -rw-r--r-- | include/linux/sunrpc/xprtsock.h | 1 | ||||
| -rw-r--r-- | include/linux/uaccess.h | 6 |
8 files changed, 82 insertions, 11 deletions
diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h index 6b318efd8a74..cdf016596659 100644 --- a/include/linux/compiler_attributes.h +++ b/include/linux/compiler_attributes.h @@ -40,6 +40,7 @@ # define __GCC4_has_attribute___noclone__ 1 # define __GCC4_has_attribute___nonstring__ 0 # define __GCC4_has_attribute___no_sanitize_address__ (__GNUC_MINOR__ >= 8) +# define __GCC4_has_attribute___fallthrough__ 0 #endif /* @@ -186,6 +187,22 @@ #endif /* + * Add the pseudo keyword 'fallthrough' so case statement blocks + * must end with any of these keywords: + * break; + * fallthrough; + * goto <label>; + * return [expression]; + * + * gcc: https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html#Statement-Attributes + */ +#if __has_attribute(__fallthrough__) +# define fallthrough __attribute__((__fallthrough__)) +#else +# define fallthrough do {} while (0) /* fallthrough */ +#endif + +/* * Note the missing underscores. * * gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute diff --git a/include/linux/export.h b/include/linux/export.h index 95f55b7f83a0..621158ecd2e2 100644 --- a/include/linux/export.h +++ b/include/linux/export.h @@ -52,10 +52,10 @@ extern struct module __this_module; __ADDRESSABLE(sym) \ asm(" .section \"___ksymtab" sec "+" #sym "\", \"a\" \n" \ " .balign 4 \n" \ - "__ksymtab_" #sym NS_SEPARATOR #ns ": \n" \ + "__ksymtab_" #ns NS_SEPARATOR #sym ": \n" \ " .long " #sym "- . \n" \ " .long __kstrtab_" #sym "- . \n" \ - " .long __kstrtab_ns_" #sym "- . \n" \ + " .long __kstrtabns_" #sym "- . \n" \ " .previous \n") #define __KSYMTAB_ENTRY(sym, sec) \ @@ -76,10 +76,10 @@ struct kernel_symbol { #else #define __KSYMTAB_ENTRY_NS(sym, sec, ns) \ static const struct kernel_symbol __ksymtab_##sym##__##ns \ - asm("__ksymtab_" #sym NS_SEPARATOR #ns) \ + asm("__ksymtab_" #ns NS_SEPARATOR #sym) \ __attribute__((section("___ksymtab" sec "+" #sym), used)) \ __aligned(sizeof(void *)) \ - = { (unsigned long)&sym, __kstrtab_##sym, __kstrtab_ns_##sym } + = { (unsigned long)&sym, __kstrtab_##sym, __kstrtabns_##sym } #define __KSYMTAB_ENTRY(sym, sec) \ static const struct kernel_symbol __ksymtab_##sym \ @@ -112,7 +112,7 @@ struct kernel_symbol { /* For every exported symbol, place a struct in the __ksymtab section */ #define ___EXPORT_SYMBOL_NS(sym, sec, ns) \ ___export_symbol_common(sym, sec); \ - static const char __kstrtab_ns_##sym[] \ + static const char __kstrtabns_##sym[] \ __attribute__((section("__ksymtab_strings"), used, aligned(1))) \ = #ns; \ __KSYMTAB_ENTRY_NS(sym, sec, ns) diff --git a/include/linux/leds.h b/include/linux/leds.h index b8df71193329..efb309dba914 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -247,7 +247,7 @@ extern void led_set_brightness(struct led_classdev *led_cdev, /** * led_set_brightness_sync - set LED brightness synchronously * @led_cdev: the LED to set - * @brightness: the brightness to set it to + * @value: the brightness to set it to * * Set an LED's brightness immediately. This function will block * the caller for the time required for accessing device registers, @@ -301,8 +301,7 @@ extern void led_sysfs_enable(struct led_classdev *led_cdev); /** * led_compose_name - compose LED class device name * @dev: LED controller device object - * @child: child fwnode_handle describing a LED or a group of synchronized LEDs; - * it must be provided only for fwnode based LEDs + * @init_data: the LED class device initialization data * @led_classdev_name: composed LED class device name * * Create LED class device name basing on the provided init_data argument. diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 9b60863429cc..ae703ea3ef48 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -356,6 +356,19 @@ static inline bool mem_cgroup_disabled(void) return !cgroup_subsys_enabled(memory_cgrp_subsys); } +static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, + bool in_low_reclaim) +{ + if (mem_cgroup_disabled()) + return 0; + + if (in_low_reclaim) + return READ_ONCE(memcg->memory.emin); + + return max(READ_ONCE(memcg->memory.emin), + READ_ONCE(memcg->memory.elow)); +} + enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, struct mem_cgroup *memcg); @@ -537,6 +550,8 @@ void mem_cgroup_handle_over_high(void); unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); +unsigned long mem_cgroup_size(struct mem_cgroup *memcg); + void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p); @@ -829,6 +844,12 @@ static inline void memcg_memory_event_mm(struct mm_struct *mm, { } +static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, + bool in_low_reclaim) +{ + return 0; +} + static inline enum mem_cgroup_protection mem_cgroup_protected( struct mem_cgroup *root, struct mem_cgroup *memcg) { @@ -968,6 +989,11 @@ static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) return 0; } +static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) +{ + return 0; +} + static inline void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) { @@ -1264,6 +1290,9 @@ void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, static inline void mem_cgroup_track_foreign_dirty(struct page *page, struct bdi_writeback *wb) { + if (mem_cgroup_disabled()) + return; + if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) mem_cgroup_track_foreign_dirty_slowpath(page, wb); } diff --git a/include/linux/slab.h b/include/linux/slab.h index ab2b98ad76e1..4d2a2fa55ed5 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -493,6 +493,10 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags) * kmalloc is the normal method of allocating memory * for objects smaller than page size in the kernel. * + * The allocated object address is aligned to at least ARCH_KMALLOC_MINALIGN + * bytes. For @size of power of two bytes, the alignment is also guaranteed + * to be at least to the size. + * * The @flags argument may be one of the GFP flags defined at * include/linux/gfp.h and described at * :ref:`Documentation/core-api/mm-api.rst <mm-api-gfp-flags>` diff --git a/include/linux/string.h b/include/linux/string.h index b2f9df7f0761..b6ccdc2c7f02 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -227,7 +227,26 @@ static inline bool strstarts(const char *str, const char *prefix) } size_t memweight(const void *ptr, size_t bytes); -void memzero_explicit(void *s, size_t count); + +/** + * memzero_explicit - Fill a region of memory (e.g. sensitive + * keying data) with 0s. + * @s: Pointer to the start of the area. + * @count: The size of the area. + * + * Note: usually using memset() is just fine (!), but in cases + * where clearing out _local_ data at the end of a scope is + * necessary, memzero_explicit() should be used instead in + * order to prevent the compiler from optimising away zeroing. + * + * memzero_explicit() doesn't need an arch-specific version as + * it just invokes the one of memset() implicitly. + */ +static inline void memzero_explicit(void *s, size_t count) +{ + memset(s, 0, count); + barrier_data(s); +} /** * kbasename - return the last part of a pathname. diff --git a/include/linux/sunrpc/xprtsock.h b/include/linux/sunrpc/xprtsock.h index 7638dbe7bc50..a940de03808d 100644 --- a/include/linux/sunrpc/xprtsock.h +++ b/include/linux/sunrpc/xprtsock.h @@ -61,6 +61,7 @@ struct sock_xprt { struct mutex recv_mutex; struct sockaddr_storage srcaddr; unsigned short srcport; + int xprt_err; /* * UDP socket buffer size parameters diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index e47d0522a1f4..d4ee6e942562 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -355,8 +355,10 @@ extern long strnlen_unsafe_user(const void __user *unsafe_addr, long count); #ifndef user_access_begin #define user_access_begin(ptr,len) access_ok(ptr, len) #define user_access_end() do { } while (0) -#define unsafe_get_user(x, ptr, err) do { if (unlikely(__get_user(x, ptr))) goto err; } while (0) -#define unsafe_put_user(x, ptr, err) do { if (unlikely(__put_user(x, ptr))) goto err; } while (0) +#define unsafe_op_wrap(op, err) do { if (unlikely(op)) goto err; } while (0) +#define unsafe_get_user(x,p,e) unsafe_op_wrap(__get_user(x,p),e) +#define unsafe_put_user(x,p,e) unsafe_op_wrap(__put_user(x,p),e) +#define unsafe_copy_to_user(d,s,l,e) unsafe_op_wrap(__copy_to_user(d,s,l),e) static inline unsigned long user_access_save(void) { return 0UL; } static inline void user_access_restore(unsigned long flags) { } #endif |