diff options
Diffstat (limited to 'arch/m68k/mm/fault.c')
| -rw-r--r-- | arch/m68k/mm/fault.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c index 3bfb5c8ac3c7..ef46e77e97a5 100644 --- a/arch/m68k/mm/fault.c +++ b/arch/m68k/mm/fault.c @@ -12,10 +12,10 @@ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/uaccess.h> +#include <linux/perf_event.h> #include <asm/setup.h> #include <asm/traps.h> -#include <asm/pgalloc.h> extern void die_if_kernel(char *, struct pt_regs *, long); @@ -85,8 +85,10 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, if (user_mode(regs)) flags |= FAULT_FLAG_USER; + + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); retry: - down_read(&mm->mmap_sem); + mmap_read_lock(mm); vma = find_vma(mm, address); if (!vma) @@ -116,7 +118,7 @@ good_area: pr_debug("do_page_fault: good_area\n"); switch (error_code & 3) { default: /* 3: write, present */ - /* fall through */ + fallthrough; case 2: /* write, not present */ if (!(vma->vm_flags & VM_WRITE)) goto acc_err; @@ -135,7 +137,7 @@ good_area: * the fault. */ - fault = handle_mm_fault(vma, address, flags); + fault = handle_mm_fault(vma, address, flags, regs); pr_debug("handle_mm_fault returns %x\n", fault); if (fault_signal_pending(fault, regs)) @@ -151,21 +153,12 @@ good_area: BUG(); } - /* - * Major/minor page fault accounting is only done on the - * initial attempt. If we go through a retry, it is extremely - * likely that the page will be found in page cache at that point. - */ if (flags & FAULT_FLAG_ALLOW_RETRY) { - if (fault & VM_FAULT_MAJOR) - current->maj_flt++; - else - current->min_flt++; if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; /* - * No need to up_read(&mm->mmap_sem) as we would + * No need to mmap_read_unlock(mm) as we would * have already released it in __lock_page_or_retry * in mm/filemap.c. */ @@ -174,7 +167,7 @@ good_area: } } - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); return 0; /* @@ -182,7 +175,7 @@ good_area: * us unable to handle the page fault gracefully. */ out_of_memory: - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); if (!user_mode(regs)) goto no_context; pagefault_out_of_memory(); @@ -211,6 +204,6 @@ acc_err: current->thread.faddr = address; send_sig: - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); return send_fault_sig(regs); } |