文件操作 - cache.h
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文件: /usr/src/linux-headers-5.15.0-186/arch/arm/include/asm/cache.h
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/* SPDX-License-Identifier: GPL-2.0 */ /* * arch/arm/include/asm/cache.h */ #ifndef __ASMARM_CACHE_H #define __ASMARM_CACHE_H #define L1_CACHE_SHIFT CONFIG_ARM_L1_CACHE_SHIFT #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) /* * Memory returned by kmalloc() may be used for DMA, so we must make * sure that all such allocations are cache aligned. Otherwise, * unrelated code may cause parts of the buffer to be read into the * cache before the transfer is done, causing old data to be seen by * the CPU. */ #define ARCH_DMA_MINALIGN L1_CACHE_BYTES /* * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers. */ #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) #define ARCH_SLAB_MINALIGN 8 #endif #define __read_mostly __section(".data..read_mostly") #endif
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