函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\slob.c Create Date:2022-07-27 17:09:46
Last Modify:2022-05-20 09:26:42 Copyright©Brick
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函数名称：an't use ksize for kmem_cache_alloc memory, only kmalloc

函数原型：size_t __ksize(const void *block)

返回类型：size_t

参数：

类型参数名称
const void *block
568  BUG_ON(!block)
569  如果此条件成立可能性小(为编译器优化)(block == ZERO_SIZE_PTR will be returned for zero sized kmalloc requests.* Dereferencing ZERO_SIZE_PTR will lead to a distinct access fault.* ZERO_SIZE_PTR can be passed to kfree though in the same way that NULL can.* Both make kfree a no-op.)则返回:0
572  sp等于virt_to_page(kaddr) returns a valid pointer if and only if* virt_addr_valid(kaddr) returns true.(block)
573  如果此条件成立可能性小(为编译器优化)(!PageSlab(sp))则返回:Returns the number of bytes in this potentially compound page.
576  align等于max_t - return maximum of two values, using the specified type*@type: data type to use*@x: first value*@y: second value(size_t, ARCH_KMALLOC_MINALIGN, Setting ARCH_SLAB_MINALIGN in arch headers allows a different alignment.* Intended for arches that get misalignment faults even for 64 bit integer* aligned buffers.)
577  m等于block减align
578  返回:SLOB_UNITS( * m)乘SLOB_UNIT
调用者
名称描述
ksizeksize - get the actual amount of memory allocated for a given object*@objp: Pointer to the object* kmalloc may internally round up allocations and return more memory* than requested. ksize() can be used to determine the actual amount of* memory allocated
kasan_unpoison_slab