diff options
Diffstat (limited to 'arch/m68k/kernel/sys_m68k.c')
| -rw-r--r-- | arch/m68k/kernel/sys_m68k.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c index 18a4de7d5934..1af5e6082467 100644 --- a/arch/m68k/kernel/sys_m68k.c +++ b/arch/m68k/kernel/sys_m68k.c @@ -27,6 +27,7 @@ #include <asm/cachectl.h> #include <asm/traps.h> #include <asm/page.h> +#include <asm/syscalls.h> #include <asm/unistd.h> #include <asm/cacheflush.h> @@ -34,8 +35,7 @@ #include <asm/tlb.h> -asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, - unsigned long error_code); +#include "../mm/fault.h" asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, @@ -388,6 +388,8 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) ret = -EPERM; if (!capable(CAP_SYS_ADMIN)) goto out; + + mmap_read_lock(current->mm); } else { struct vm_area_struct *vma; @@ -399,9 +401,9 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) * Verify that the specified address region actually belongs * to this process. */ - down_read(¤t->mm->mmap_sem); - vma = find_vma(current->mm, addr); - if (!vma || addr < vma->vm_start || addr + len > vma->vm_end) + mmap_read_lock(current->mm); + vma = vma_lookup(current->mm, addr); + if (!vma || addr + len > vma->vm_end) goto out_unlock; } @@ -450,7 +452,7 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) } } out_unlock: - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); out: return ret; } @@ -472,7 +474,7 @@ sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, spinlock_t *ptl; unsigned long mem_value; - down_read(&mm->mmap_sem); + mmap_read_lock(mm); pgd = pgd_offset(mm, (unsigned long)mem); if (!pgd_present(*pgd)) goto bad_access; @@ -486,6 +488,8 @@ sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, if (!pmd_present(*pmd)) goto bad_access; pte = pte_offset_map_lock(mm, pmd, (unsigned long)mem, &ptl); + if (!pte) + goto bad_access; if (!pte_present(*pte) || !pte_dirty(*pte) || !pte_write(*pte)) { pte_unmap_unlock(pte, ptl); @@ -501,11 +505,11 @@ sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, __put_user(newval, mem); pte_unmap_unlock(pte, ptl); - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); return mem_value; bad_access: - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); /* This is not necessarily a bad access, we can get here if a memory we're trying to write to should be copied-on-write. Make the kernel do the necessary page stuff, then re-iterate. @@ -545,13 +549,13 @@ sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, struct mm_struct *mm = current->mm; unsigned long mem_value; - down_read(&mm->mmap_sem); + mmap_read_lock(mm); mem_value = *mem; if (mem_value == oldval) *mem = newval; - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); return mem_value; } |