mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Mark Rutland](/assets/img/avatar_default.png)
Now that all architectures use 64 consistently as the base type for the atomic64 API, let's have the CONFIG_64BIT definition of atomic64_t use s64 as the underlying type for atomic64_t, rather than long, matching the generated headers. On architectures where atomic64_read(v) is READ_ONCE(v->counter), this patch will cause the return type of atomic64_read() to be s64. As of this patch, the atomic64 API can be relied upon to consistently return s64 where a value rather than boolean condition is returned. This should make code more robust, and simpler, allowing for the removal of casts previously required to ensure consistent types. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Cc: aou@eecs.berkeley.edu Cc: arnd@arndb.de Cc: bp@alien8.de Cc: catalin.marinas@arm.com Cc: davem@davemloft.net Cc: fenghua.yu@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: ink@jurassic.park.msu.ru Cc: jhogan@kernel.org Cc: linux@armlinux.org.uk Cc: mattst88@gmail.com Cc: mpe@ellerman.id.au Cc: palmer@sifive.com Cc: paul.burton@mips.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: rth@twiddle.net Cc: tony.luck@intel.com Cc: vgupta@synopsys.com Link: https://lkml.kernel.org/r/20190522132250.26499-17-mark.rutland@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
229 lines
5.4 KiB
C
229 lines
5.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_TYPES_H
|
|
#define _LINUX_TYPES_H
|
|
|
|
#define __EXPORTED_HEADERS__
|
|
#include <uapi/linux/types.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define DECLARE_BITMAP(name,bits) \
|
|
unsigned long name[BITS_TO_LONGS(bits)]
|
|
|
|
typedef u32 __kernel_dev_t;
|
|
|
|
typedef __kernel_fd_set fd_set;
|
|
typedef __kernel_dev_t dev_t;
|
|
typedef __kernel_ino_t ino_t;
|
|
typedef __kernel_mode_t mode_t;
|
|
typedef unsigned short umode_t;
|
|
typedef u32 nlink_t;
|
|
typedef __kernel_off_t off_t;
|
|
typedef __kernel_pid_t pid_t;
|
|
typedef __kernel_daddr_t daddr_t;
|
|
typedef __kernel_key_t key_t;
|
|
typedef __kernel_suseconds_t suseconds_t;
|
|
typedef __kernel_timer_t timer_t;
|
|
typedef __kernel_clockid_t clockid_t;
|
|
typedef __kernel_mqd_t mqd_t;
|
|
|
|
typedef _Bool bool;
|
|
|
|
typedef __kernel_uid32_t uid_t;
|
|
typedef __kernel_gid32_t gid_t;
|
|
typedef __kernel_uid16_t uid16_t;
|
|
typedef __kernel_gid16_t gid16_t;
|
|
|
|
typedef unsigned long uintptr_t;
|
|
|
|
#ifdef CONFIG_HAVE_UID16
|
|
/* This is defined by include/asm-{arch}/posix_types.h */
|
|
typedef __kernel_old_uid_t old_uid_t;
|
|
typedef __kernel_old_gid_t old_gid_t;
|
|
#endif /* CONFIG_UID16 */
|
|
|
|
#if defined(__GNUC__)
|
|
typedef __kernel_loff_t loff_t;
|
|
#endif
|
|
|
|
/*
|
|
* The following typedefs are also protected by individual ifdefs for
|
|
* historical reasons:
|
|
*/
|
|
#ifndef _SIZE_T
|
|
#define _SIZE_T
|
|
typedef __kernel_size_t size_t;
|
|
#endif
|
|
|
|
#ifndef _SSIZE_T
|
|
#define _SSIZE_T
|
|
typedef __kernel_ssize_t ssize_t;
|
|
#endif
|
|
|
|
#ifndef _PTRDIFF_T
|
|
#define _PTRDIFF_T
|
|
typedef __kernel_ptrdiff_t ptrdiff_t;
|
|
#endif
|
|
|
|
#ifndef _TIME_T
|
|
#define _TIME_T
|
|
typedef __kernel_time_t time_t;
|
|
#endif
|
|
|
|
#ifndef _CLOCK_T
|
|
#define _CLOCK_T
|
|
typedef __kernel_clock_t clock_t;
|
|
#endif
|
|
|
|
#ifndef _CADDR_T
|
|
#define _CADDR_T
|
|
typedef __kernel_caddr_t caddr_t;
|
|
#endif
|
|
|
|
/* bsd */
|
|
typedef unsigned char u_char;
|
|
typedef unsigned short u_short;
|
|
typedef unsigned int u_int;
|
|
typedef unsigned long u_long;
|
|
|
|
/* sysv */
|
|
typedef unsigned char unchar;
|
|
typedef unsigned short ushort;
|
|
typedef unsigned int uint;
|
|
typedef unsigned long ulong;
|
|
|
|
#ifndef __BIT_TYPES_DEFINED__
|
|
#define __BIT_TYPES_DEFINED__
|
|
|
|
typedef u8 u_int8_t;
|
|
typedef s8 int8_t;
|
|
typedef u16 u_int16_t;
|
|
typedef s16 int16_t;
|
|
typedef u32 u_int32_t;
|
|
typedef s32 int32_t;
|
|
|
|
#endif /* !(__BIT_TYPES_DEFINED__) */
|
|
|
|
typedef u8 uint8_t;
|
|
typedef u16 uint16_t;
|
|
typedef u32 uint32_t;
|
|
|
|
#if defined(__GNUC__)
|
|
typedef u64 uint64_t;
|
|
typedef u64 u_int64_t;
|
|
typedef s64 int64_t;
|
|
#endif
|
|
|
|
/* this is a special 64bit data type that is 8-byte aligned */
|
|
#define aligned_u64 __aligned_u64
|
|
#define aligned_be64 __aligned_be64
|
|
#define aligned_le64 __aligned_le64
|
|
|
|
/**
|
|
* The type used for indexing onto a disc or disc partition.
|
|
*
|
|
* Linux always considers sectors to be 512 bytes long independently
|
|
* of the devices real block size.
|
|
*
|
|
* blkcnt_t is the type of the inode's block count.
|
|
*/
|
|
typedef u64 sector_t;
|
|
typedef u64 blkcnt_t;
|
|
|
|
/*
|
|
* The type of an index into the pagecache.
|
|
*/
|
|
#define pgoff_t unsigned long
|
|
|
|
/*
|
|
* A dma_addr_t can hold any valid DMA address, i.e., any address returned
|
|
* by the DMA API.
|
|
*
|
|
* If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
|
|
* bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
|
|
* but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
|
|
* so they don't care about the size of the actual bus addresses.
|
|
*/
|
|
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
|
|
typedef u64 dma_addr_t;
|
|
#else
|
|
typedef u32 dma_addr_t;
|
|
#endif
|
|
|
|
typedef unsigned int __bitwise gfp_t;
|
|
typedef unsigned int __bitwise slab_flags_t;
|
|
typedef unsigned int __bitwise fmode_t;
|
|
|
|
#ifdef CONFIG_PHYS_ADDR_T_64BIT
|
|
typedef u64 phys_addr_t;
|
|
#else
|
|
typedef u32 phys_addr_t;
|
|
#endif
|
|
|
|
typedef phys_addr_t resource_size_t;
|
|
|
|
/*
|
|
* This type is the placeholder for a hardware interrupt number. It has to be
|
|
* big enough to enclose whatever representation is used by a given platform.
|
|
*/
|
|
typedef unsigned long irq_hw_number_t;
|
|
|
|
typedef struct {
|
|
int counter;
|
|
} atomic_t;
|
|
|
|
#ifdef CONFIG_64BIT
|
|
typedef struct {
|
|
s64 counter;
|
|
} atomic64_t;
|
|
#endif
|
|
|
|
struct list_head {
|
|
struct list_head *next, *prev;
|
|
};
|
|
|
|
struct hlist_head {
|
|
struct hlist_node *first;
|
|
};
|
|
|
|
struct hlist_node {
|
|
struct hlist_node *next, **pprev;
|
|
};
|
|
|
|
struct ustat {
|
|
__kernel_daddr_t f_tfree;
|
|
__kernel_ino_t f_tinode;
|
|
char f_fname[6];
|
|
char f_fpack[6];
|
|
};
|
|
|
|
/**
|
|
* struct callback_head - callback structure for use with RCU and task_work
|
|
* @next: next update requests in a list
|
|
* @func: actual update function to call after the grace period.
|
|
*
|
|
* The struct is aligned to size of pointer. On most architectures it happens
|
|
* naturally due ABI requirements, but some architectures (like CRIS) have
|
|
* weird ABI and we need to ask it explicitly.
|
|
*
|
|
* The alignment is required to guarantee that bit 0 of @next will be
|
|
* clear under normal conditions -- as long as we use call_rcu() or
|
|
* call_srcu() to queue the callback.
|
|
*
|
|
* This guarantee is important for few reasons:
|
|
* - future call_rcu_lazy() will make use of lower bits in the pointer;
|
|
* - the structure shares storage space in struct page with @compound_head,
|
|
* which encode PageTail() in bit 0. The guarantee is needed to avoid
|
|
* false-positive PageTail().
|
|
*/
|
|
struct callback_head {
|
|
struct callback_head *next;
|
|
void (*func)(struct callback_head *head);
|
|
} __attribute__((aligned(sizeof(void *))));
|
|
#define rcu_head callback_head
|
|
|
|
typedef void (*rcu_callback_t)(struct rcu_head *head);
|
|
typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* _LINUX_TYPES_H */
|