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mm: convert return type of handle_mm_fault() caller to vm_fault_t 

Use new return type vm_fault_t for fault handler.  For now, this is just
documenting that the function returns a VM_FAULT value rather than an
errno.  Once all instances are converted, vm_fault_t will become a
distinct type.

Ref-> commit 1c8f422059 ("mm: change return type to vm_fault_t")

In this patch all the caller of handle_mm_fault() are changed to return
vm_fault_t type.

Link: http://lkml.kernel.org/r/20180617084810.GA6730@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: David S. Miller <davem@davemloft.net>
Cc: Richard Weinberger <richard@nod.at>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Souptick Joarder 2018-08-17 15:44:47 -07:00 committed by Linus Torvalds
parent 0882ff9190
commit 50a7ca3c6f
32 changed files with 69 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/alpha/mm/fault.c
View File

@ -87,7 +87,8 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
struct vm_area_struct * vma;
struct mm_struct *mm = current->mm;
const struct exception_table_entry *fixup;
int fault, si_code = SEGV_MAPERR;
int si_code = SEGV_MAPERR;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
/* As of EV6, a load into $31/$f31 is a prefetch, and never faults

4
arch/arc/mm/fault.c
View File

@ -15,6 +15,7 @@
#include <linux/uaccess.h>
#include <linux/kdebug.h>
#include <linux/perf_event.h>
#include <linux/mm_types.h>
#include <asm/pgalloc.h>
#include <asm/mmu.h>
@ -66,7 +67,8 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
siginfo_t info;
int fault, ret;
int ret;
vm_fault_t fault;
int write = regs->ecr_cause & ECR_C_PROTV_STORE; /* ST/EX */
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;

7
arch/arm/mm/fault.c
View File

@ -224,12 +224,12 @@ static inline bool access_error(unsigned int fsr, struct vm_area_struct *vma)
return vma->vm_flags & mask ? false : true;
}
static int __kprobes
static vm_fault_t __kprobes
__do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr,
unsigned int flags, struct task_struct *tsk)
{
struct vm_area_struct *vma;
int fault;
vm_fault_t fault;
vma = find_vma(mm, addr);
fault = VM_FAULT_BADMAP;
@ -264,7 +264,8 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
{
struct task_struct *tsk;
struct mm_struct *mm;
int fault, sig, code;
int sig, code;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
if (notify_page_fault(regs, fsr))

6
arch/arm64/mm/fault.c
View File

@ -379,12 +379,12 @@ static void do_bad_area(unsigned long addr, unsigned int esr, struct pt_regs *re
#define VM_FAULT_BADMAP 0x010000
#define VM_FAULT_BADACCESS 0x020000
static int __do_page_fault(struct mm_struct *mm, unsigned long addr,
static vm_fault_t __do_page_fault(struct mm_struct *mm, unsigned long addr,
unsigned int mm_flags, unsigned long vm_flags,
struct task_struct *tsk)
{
struct vm_area_struct *vma;
int fault;
vm_fault_t fault;
vma = find_vma(mm, addr);
fault = VM_FAULT_BADMAP;
@ -427,7 +427,7 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
struct task_struct *tsk;
struct mm_struct *mm;
struct siginfo si;
int fault, major = 0;
vm_fault_t fault, major = 0;
unsigned long vm_flags = VM_READ | VM_WRITE;
unsigned int mm_flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;

2
arch/hexagon/mm/vm_fault.c
View File

@ -52,7 +52,7 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
struct mm_struct *mm = current->mm;
int si_signo;
int si_code = SEGV_MAPERR;
int fault;
vm_fault_t fault;
const struct exception_table_entry *fixup;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;

2
arch/ia64/mm/fault.c
View File

@ -86,7 +86,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
struct vm_area_struct *vma, *prev_vma;
struct mm_struct *mm = current->mm;
unsigned long mask;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
mask = ((((isr >> IA64_ISR_X_BIT) & 1UL) << VM_EXEC_BIT)

4
arch/m68k/mm/fault.c
View File

@ -70,7 +70,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
{
struct mm_struct *mm = current->mm;
struct vm_area_struct * vma;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
pr_debug("do page fault:\nregs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld, %p\n",
@ -136,7 +136,7 @@ good_area:
*/
fault = handle_mm_fault(vma, address, flags);
pr_debug("handle_mm_fault returns %d\n", fault);
pr_debug("handle_mm_fault returns %x\n", fault);
if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
return 0;

2
arch/microblaze/mm/fault.c
View File

@ -90,7 +90,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
struct mm_struct *mm = current->mm;
int code = SEGV_MAPERR;
int is_write = error_code & ESR_S;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
regs->ear = address;

2
arch/mips/mm/fault.c
View File

@ -43,7 +43,7 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write,
struct mm_struct *mm = tsk->mm;
const int field = sizeof(unsigned long) * 2;
int si_code;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10);

2
arch/nds32/mm/fault.c
View File

@ -73,7 +73,7 @@ void do_page_fault(unsigned long entry, unsigned long addr,
struct mm_struct *mm;
struct vm_area_struct *vma;
int si_code;
int fault;
vm_fault_t fault;
unsigned int mask = VM_READ | VM_WRITE | VM_EXEC;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;

2
arch/nios2/mm/fault.c
View File

@ -47,7 +47,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long cause,
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
int code = SEGV_MAPERR;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
cause >>= 2;

2
arch/openrisc/mm/fault.c
View File

@ -53,7 +53,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
struct mm_struct *mm;
struct vm_area_struct *vma;
int si_code;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
tsk = current;

2
arch/parisc/mm/fault.c
View File

@ -262,7 +262,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
struct task_struct *tsk;
struct mm_struct *mm;
unsigned long acc_type;
int fault = 0;
vm_fault_t fault = 0;
unsigned int flags;
if (faulthandler_disabled())

4
arch/powerpc/include/asm/copro.h
View File

@ -10,13 +10,15 @@
#ifndef _ASM_POWERPC_COPRO_H
#define _ASM_POWERPC_COPRO_H
#include <linux/mm_types.h>
struct copro_slb
{
u64 esid, vsid;
};
int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea,
unsigned long dsisr, unsigned *flt);
unsigned long dsisr, vm_fault_t *flt);
int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb);

2
arch/powerpc/mm/copro_fault.c
View File

@ -34,7 +34,7 @@
* to handle fortunately.
*/
int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea,
unsigned long dsisr, unsigned *flt)
unsigned long dsisr, vm_fault_t *flt)
{
struct vm_area_struct *vma;
unsigned long is_write;

7
arch/powerpc/mm/fault.c
View File

@ -156,7 +156,7 @@ static noinline int bad_access(struct pt_regs *regs, unsigned long address)
}
static int do_sigbus(struct pt_regs *regs, unsigned long address,
unsigned int fault)
vm_fault_t fault)
{
siginfo_t info;
unsigned int lsb = 0;
@ -187,7 +187,8 @@ static int do_sigbus(struct pt_regs *regs, unsigned long address,
return 0;
}
static int mm_fault_error(struct pt_regs *regs, unsigned long addr, int fault)
static int mm_fault_error(struct pt_regs *regs, unsigned long addr,
vm_fault_t fault)
{
/*
* Kernel page fault interrupted by SIGKILL. We have no reason to
@ -415,7 +416,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
int is_exec = TRAP(regs) == 0x400;
int is_user = user_mode(regs);
int is_write = page_fault_is_write(error_code);
int fault, major = 0;
vm_fault_t fault, major = 0;
bool must_retry = false;
if (notify_page_fault(regs))

2
arch/powerpc/platforms/cell/spufs/fault.c
View File

@ -111,7 +111,7 @@ int spufs_handle_class1(struct spu_context *ctx)
{
u64 ea, dsisr, access;
unsigned long flags;
unsigned flt = 0;
vm_fault_t flt = 0;
int ret;
/*

3
arch/riscv/mm/fault.c
View File

@ -41,7 +41,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs)
struct mm_struct *mm;
unsigned long addr, cause;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
int fault, code = SEGV_MAPERR;
int code = SEGV_MAPERR;
vm_fault_t fault;
cause = regs->scause;
addr = regs->sbadaddr;

13
arch/s390/mm/fault.c
View File

@ -341,7 +341,8 @@ static noinline int signal_return(struct pt_regs *regs)
return -EACCES;
}
static noinline void do_fault_error(struct pt_regs *regs, int access, int fault)
static noinline void do_fault_error(struct pt_regs *regs, int access,
vm_fault_t fault)
{
int si_code;
@ -401,7 +402,7 @@ static noinline void do_fault_error(struct pt_regs *regs, int access, int fault)
* 11 Page translation -> Not present (nullification)
* 3b Region third trans. -> Not present (nullification)
*/
static inline int do_exception(struct pt_regs *regs, int access)
static inline vm_fault_t do_exception(struct pt_regs *regs, int access)
{
struct gmap *gmap;
struct task_struct *tsk;
@ -411,7 +412,7 @@ static inline int do_exception(struct pt_regs *regs, int access)
unsigned long trans_exc_code;
unsigned long address;
unsigned int flags;
int fault;
vm_fault_t fault;
tsk = current;
/*
@ -564,7 +565,8 @@ out:
void do_protection_exception(struct pt_regs *regs)
{
unsigned long trans_exc_code;
int access, fault;
int access;
vm_fault_t fault;
trans_exc_code = regs->int_parm_long;
/*
@ -599,7 +601,8 @@ NOKPROBE_SYMBOL(do_protection_exception);
void do_dat_exception(struct pt_regs *regs)
{
int access, fault;
int access;
vm_fault_t fault;
access = VM_READ | VM_EXEC | VM_WRITE;
fault = do_exception(regs, access);

4
arch/sh/mm/fault.c
View File

@ -313,7 +313,7 @@ do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address)
static noinline int
mm_fault_error(struct pt_regs *regs, unsigned long error_code,
unsigned long address, unsigned int fault)
unsigned long address, vm_fault_t fault)
{
/*
* Pagefault was interrupted by SIGKILL. We have no reason to
@ -396,7 +396,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
struct task_struct *tsk;
struct mm_struct *mm;
struct vm_area_struct * vma;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
tsk = current;

3
arch/sparc/mm/fault_32.c
View File

@ -166,7 +166,8 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
unsigned int fixup;
unsigned long g2;
int from_user = !(regs->psr & PSR_PS);
int fault, code;
int code;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
if (text_fault)

3
arch/sparc/mm/fault_64.c
View File

@ -278,7 +278,8 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
unsigned int insn = 0;
int si_code, fault_code, fault;
int si_code, fault_code;
vm_fault_t fault;
unsigned long address, mm_rss;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;

2
arch/um/kernel/trap.c
View File

@ -72,7 +72,7 @@ good_area:
}
do {
int fault;
vm_fault_t fault;
fault = handle_mm_fault(vma, address, flags);

9
arch/unicore32/mm/fault.c
View File

@ -168,11 +168,11 @@ static inline bool access_error(unsigned int fsr, struct vm_area_struct *vma)
return vma->vm_flags & mask ? false : true;
}
static int __do_pf(struct mm_struct *mm, unsigned long addr, unsigned int fsr,
unsigned int flags, struct task_struct *tsk)
static vm_fault_t __do_pf(struct mm_struct *mm, unsigned long addr,
unsigned int fsr, unsigned int flags, struct task_struct *tsk)
{
struct vm_area_struct *vma;
int fault;
vm_fault_t fault;
vma = find_vma(mm, addr);
fault = VM_FAULT_BADMAP;
@ -209,7 +209,8 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
{
struct task_struct *tsk;
struct mm_struct *mm;
int fault, sig, code;
int sig, code;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
tsk = current;

5
arch/x86/mm/fault.c
View File

@ -16,6 +16,7 @@
#include <linux/prefetch.h> /* prefetchw */
#include <linux/context_tracking.h> /* exception_enter(), ... */
#include <linux/uaccess.h> /* faulthandler_disabled() */
#include <linux/mm_types.h>
#include <asm/cpufeature.h> /* boot_cpu_has, ... */
#include <asm/traps.h> /* dotraplinkage, ... */
@ -999,7 +1000,7 @@ do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address,
static noinline void
mm_fault_error(struct pt_regs *regs, unsigned long error_code,
unsigned long address, u32 *pkey, unsigned int fault)
unsigned long address, u32 *pkey, vm_fault_t fault)
{
if (fatal_signal_pending(current) && !(error_code & X86_PF_USER)) {
no_context(regs, error_code, address, 0, 0);
@ -1213,7 +1214,7 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code,
struct vm_area_struct *vma;
struct task_struct *tsk;
struct mm_struct *mm;
int fault, major = 0;
vm_fault_t fault, major = 0;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
u32 pkey;

2
arch/xtensa/mm/fault.c
View File

@ -42,7 +42,7 @@ void do_page_fault(struct pt_regs *regs)
int code;
int is_write, is_exec;
int fault;
vm_fault_t fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
code = SEGV_MAPERR;

2
drivers/iommu/amd_iommu_v2.c
View File

@ -508,7 +508,7 @@ static void do_fault(struct work_struct *work)
{
struct fault *fault = container_of(work, struct fault, work);
struct vm_area_struct *vma;
int ret = VM_FAULT_ERROR;
vm_fault_t ret = VM_FAULT_ERROR;
unsigned int flags = 0;
struct mm_struct *mm;
u64 address;

4
drivers/iommu/intel-svm.c
View File

@ -24,6 +24,7 @@
#include <linux/pci-ats.h>
#include <linux/dmar.h>
#include <linux/interrupt.h>
#include <linux/mm_types.h>
#include <asm/page.h>
#define PASID_ENTRY_P BIT_ULL(0)
@ -594,7 +595,8 @@ static irqreturn_t prq_event_thread(int irq, void *d)
struct vm_area_struct *vma;
struct page_req_dsc *req;
struct qi_desc resp;
int ret, result;
int result;
vm_fault_t ret;
u64 address;
handled = 1;

2
drivers/misc/cxl/fault.c
View File

@ -134,7 +134,7 @@ static int cxl_handle_segment_miss(struct cxl_context *ctx,
int cxl_handle_mm_fault(struct mm_struct *mm, u64 dsisr, u64 dar)
{
unsigned flt = 0;
vm_fault_t flt = 0;
int result;
unsigned long access, flags, inv_flags = 0;

3
drivers/misc/ocxl/link.c
View File

@ -2,6 +2,7 @@
// Copyright 2017 IBM Corp.
#include <linux/sched/mm.h>
#include <linux/mutex.h>
#include <linux/mm_types.h>
#include <linux/mmu_context.h>
#include <asm/copro.h>
#include <asm/pnv-ocxl.h>
@ -126,7 +127,7 @@ static void ack_irq(struct spa *spa, enum xsl_response r)
static void xsl_fault_handler_bh(struct work_struct *fault_work)
{
unsigned int flt = 0;
vm_fault_t flt = 0;
unsigned long access, flags, inv_flags = 0;
enum xsl_response r;
struct xsl_fault *fault = container_of(fault_work, struct xsl_fault,

8
mm/hmm.c
View File

@ -299,14 +299,14 @@ static int hmm_vma_do_fault(struct mm_walk *walk, unsigned long addr,
struct hmm_vma_walk *hmm_vma_walk = walk->private;
struct hmm_range *range = hmm_vma_walk->range;
struct vm_area_struct *vma = walk->vma;
int r;
vm_fault_t ret;
flags |= hmm_vma_walk->block ? 0 : FAULT_FLAG_ALLOW_RETRY;
flags |= write_fault ? FAULT_FLAG_WRITE : 0;
r = handle_mm_fault(vma, addr, flags);
if (r & VM_FAULT_RETRY)
ret = handle_mm_fault(vma, addr, flags);
if (ret & VM_FAULT_RETRY)
return -EBUSY;
if (r & VM_FAULT_ERROR) {
if (ret & VM_FAULT_ERROR) {
*pfn = range->values[HMM_PFN_ERROR];
return -EFAULT;
}

2
mm/ksm.c
View File

@ -470,7 +470,7 @@ static inline bool ksm_test_exit(struct mm_struct *mm)
static int break_ksm(struct vm_area_struct *vma, unsigned long addr)
{
struct page *page;
int ret = 0;
vm_fault_t ret = 0;
do {
cond_resched();