Commit 8d0920bd authored by David Hildenbrand's avatar David Hildenbrand
Browse files

mm: remove VM_DENYWRITE 



All in-tree users of MAP_DENYWRITE are gone. MAP_DENYWRITE cannot be
set from user space, so all users are gone; let's remove it.

Acked-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
parent 4589ff7c

fs/proc/task_mmu.c

+0 −1
Original line number Diff line number Diff line
@@ -619,7 +619,6 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma) 
		[ilog2(VM_MAYSHARE)]	= "ms",

		[ilog2(VM_GROWSDOWN)]	= "gd",

		[ilog2(VM_PFNMAP)]	= "pf",

		[ilog2(VM_DENYWRITE)]	= "dw",

		[ilog2(VM_LOCKED)]	= "lo",

		[ilog2(VM_IO)]		= "io",

		[ilog2(VM_SEQ_READ)]	= "sr",

include/linux/mm.h

+0 −1
Original line number Diff line number Diff line
@@ -281,7 +281,6 @@ extern unsigned int kobjsize(const void *objp); 
#define VM_GROWSDOWN	0x00000100	/* general info on the segment */

#define VM_UFFD_MISSING	0x00000200	/* missing pages tracking */

#define VM_PFNMAP	0x00000400	/* Page-ranges managed without "struct page", just pure PFN */

#define VM_DENYWRITE	0x00000800	/* ETXTBSY on write attempts.. */

#define VM_UFFD_WP	0x00001000	/* wrprotect pages tracking */



#define VM_LOCKED	0x00002000

include/linux/mman.h

+0 −1
Original line number Diff line number Diff line
@@ -153,7 +153,6 @@ static inline unsigned long 
calc_vm_flag_bits(unsigned long flags)

{

	return _calc_vm_trans(flags, MAP_GROWSDOWN,  VM_GROWSDOWN ) |

	       _calc_vm_trans(flags, MAP_DENYWRITE,  VM_DENYWRITE ) |

	       _calc_vm_trans(flags, MAP_LOCKED,     VM_LOCKED    ) |

	       _calc_vm_trans(flags, MAP_SYNC,	     VM_SYNC      ) |

	       arch_calc_vm_flag_bits(flags);

include/trace/events/mmflags.h

+0 −1
Original line number Diff line number Diff line
@@ -165,7 +165,6 @@ IF_HAVE_PG_SKIP_KASAN_POISON(PG_skip_kasan_poison, "skip_kasan_poison") 
	{VM_UFFD_MISSING,		"uffd_missing"	},		\

IF_HAVE_UFFD_MINOR(VM_UFFD_MINOR,	"uffd_minor"	)		\

	{VM_PFNMAP,			"pfnmap"	},		\

	{VM_DENYWRITE,			"denywrite"	},		\

	{VM_UFFD_WP,			"uffd_wp"	},		\

	{VM_LOCKED,			"locked"	},		\

	{VM_IO,				"io"		},		\

kernel/events/core.c

+0 −2
Original line number Diff line number Diff line
@@ -8307,8 +8307,6 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event) 
	else

		flags = MAP_PRIVATE;



	if (vma->vm_flags & VM_DENYWRITE)

		flags |= MAP_DENYWRITE;

	if (vma->vm_flags & VM_LOCKED)

		flags |= MAP_LOCKED;

	if (is_vm_hugetlb_page(vma))