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https://gitee.com/bianbu-linux/linux-6.6
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534aa1dc97
An inclusion of cache.h in printk.h was added in 2014 in commitc28aa1f0a8("printk/cache: mark printk_once test variable __read_mostly") in order to bring in the definition of __read_mostly. The usage of __read_mostly was later removed in commit3ec25826ae("printk: Tie printk_once / printk_deferred_once into .data.once for reset") which made the inclusion of cache.h unnecessary, so remove it. We have a small amount of code that depended on the inclusion of cache.h from printk.h; fix that code to include the appropriate header. This fixes a circular inclusion on arm64 (linux/printk.h -> linux/cache.h -> asm/cache.h -> linux/kasan-enabled.h -> linux/static_key.h -> linux/jump_label.h -> linux/bug.h -> asm/bug.h -> linux/printk.h) that would otherwise be introduced by the next patch. Build tested using {allyesconfig,defconfig} x {arm64,x86_64}. Link: https://linux-review.googlesource.com/id/I8fd51f72c9ef1f2d6afd3b2cbc875aa4792c1fba Link: https://lkml.kernel.org/r/20220427195820.1716975-1-pcc@google.com Signed-off-by: Peter Collingbourne <pcc@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Rientjes <rientjes@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kees Cook <keescook@chromium.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_CSKY_PROCESSOR_H
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#define __ASM_CSKY_PROCESSOR_H
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#include <linux/bitops.h>
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#include <linux/cache.h>
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#include <asm/ptrace.h>
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#include <asm/current.h>
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#include <abi/reg_ops.h>
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#include <abi/regdef.h>
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#include <abi/switch_context.h>
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#ifdef CONFIG_CPU_HAS_FPU
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#include <abi/fpu.h>
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#endif
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struct cpuinfo_csky {
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unsigned long asid_cache;
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} __aligned(SMP_CACHE_BYTES);
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extern struct cpuinfo_csky cpu_data[];
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/*
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* User space process size: 2GB. This is hardcoded into a few places,
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* so don't change it unless you know what you are doing. TASK_SIZE
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* for a 64 bit kernel expandable to 8192EB, of which the current CSKY
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* implementations will "only" be able to use 1TB ...
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*/
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#define TASK_SIZE (PAGE_OFFSET - (PAGE_SIZE * 8))
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#ifdef __KERNEL__
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#define STACK_TOP TASK_SIZE
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#define STACK_TOP_MAX STACK_TOP
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#endif
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
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struct thread_struct {
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unsigned long sp; /* kernel stack pointer */
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unsigned long trap_no; /* saved status register */
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/* FPU regs */
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struct user_fp __aligned(16) user_fp;
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};
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#define INIT_THREAD { \
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.sp = sizeof(init_stack) + (unsigned long) &init_stack, \
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}
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/*
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* Do necessary setup to start up a newly executed thread.
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*
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* pass the data segment into user programs if it exists,
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* it can't hurt anything as far as I can tell
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*/
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#define start_thread(_regs, _pc, _usp) \
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do { \
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(_regs)->pc = (_pc); \
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(_regs)->regs[1] = 0; /* ABIV1 is R7, uClibc_main rtdl arg */ \
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(_regs)->regs[2] = 0; \
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(_regs)->regs[3] = 0; /* ABIV2 is R7, use it? */ \
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(_regs)->sr &= ~PS_S; \
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(_regs)->usp = (_usp); \
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} while (0)
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/* Forward declaration, a strange C thing */
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struct task_struct;
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/* Free all resources held by a thread. */
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static inline void release_thread(struct task_struct *dead_task)
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{
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}
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/* Prepare to copy thread state - unlazy all lazy status */
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#define prepare_to_copy(tsk) do { } while (0)
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extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
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unsigned long __get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
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#define KSTK_ESP(tsk) (task_pt_regs(tsk)->usp)
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#define task_pt_regs(p) \
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((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
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#define cpu_relax() barrier()
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#endif /* __ASM_CSKY_PROCESSOR_H */
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