mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 14:05:08 +07:00
39ca5fb492
The mutex mm->context->lock for init_mm is not initialized for init_mm. This wasn't a problem because it remained unused. This changed however since commit4fc19708b1("x86/alternatives: Initialize temporary mm for patching") Initialize the mutex for init_mm. Fixes:4fc19708b1("x86/alternatives: Initialize temporary mm for patching") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Nadav Amit <namit@vmware.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@kernel.org> Link: https://lkml.kernel.org/r/20190701173354.2pe62hhliok2afea@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_MMU_H
|
|
#define _ASM_X86_MMU_H
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/atomic.h>
|
|
|
|
/*
|
|
* x86 has arch-specific MMU state beyond what lives in mm_struct.
|
|
*/
|
|
typedef struct {
|
|
/*
|
|
* ctx_id uniquely identifies this mm_struct. A ctx_id will never
|
|
* be reused, and zero is not a valid ctx_id.
|
|
*/
|
|
u64 ctx_id;
|
|
|
|
/*
|
|
* Any code that needs to do any sort of TLB flushing for this
|
|
* mm will first make its changes to the page tables, then
|
|
* increment tlb_gen, then flush. This lets the low-level
|
|
* flushing code keep track of what needs flushing.
|
|
*
|
|
* This is not used on Xen PV.
|
|
*/
|
|
atomic64_t tlb_gen;
|
|
|
|
#ifdef CONFIG_MODIFY_LDT_SYSCALL
|
|
struct rw_semaphore ldt_usr_sem;
|
|
struct ldt_struct *ldt;
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_64
|
|
/* True if mm supports a task running in 32 bit compatibility mode. */
|
|
unsigned short ia32_compat;
|
|
#endif
|
|
|
|
struct mutex lock;
|
|
void __user *vdso; /* vdso base address */
|
|
const struct vdso_image *vdso_image; /* vdso image in use */
|
|
|
|
atomic_t perf_rdpmc_allowed; /* nonzero if rdpmc is allowed */
|
|
#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
|
|
/*
|
|
* One bit per protection key says whether userspace can
|
|
* use it or not. protected by mmap_sem.
|
|
*/
|
|
u16 pkey_allocation_map;
|
|
s16 execute_only_pkey;
|
|
#endif
|
|
#ifdef CONFIG_X86_INTEL_MPX
|
|
/* address of the bounds directory */
|
|
void __user *bd_addr;
|
|
#endif
|
|
} mm_context_t;
|
|
|
|
#define INIT_MM_CONTEXT(mm) \
|
|
.context = { \
|
|
.ctx_id = 1, \
|
|
.lock = __MUTEX_INITIALIZER(mm.context.lock), \
|
|
}
|
|
|
|
void leave_mm(int cpu);
|
|
|
|
#endif /* _ASM_X86_MMU_H */
|