From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, daniel.m.jordan@oracle.com,
dbueso@suse.de, hughd@google.com, jgg@ziepe.ca,
jglisse@redhat.com, jhubbard@nvidia.com, ldufour@linux.ibm.com,
Liam.Howlett@oracle.com, linux-mm@kvack.org,
mm-commits@vger.kernel.org, peterz@infradead.org,
rientjes@google.com, torvalds@linux-foundation.org,
vbabka@suse.cz, walken@google.com, willy@infradead.org,
yinghan@google.com
Subject: [patch 69/93] mmap locking API: rename mmap_sem to mmap_lock
Date: Mon, 08 Jun 2020 21:33:47 -0700 [thread overview]
Message-ID: <20200609043347.O2aC6ZQoF%akpm@linux-foundation.org> (raw)
In-Reply-To: <20200608212922.5b7fa74ca3f4e2444441b7f9@linux-foundation.org>
From: Michel Lespinasse <walken@google.com>
Subject: mmap locking API: rename mmap_sem to mmap_lock
Rename the mmap_sem field to mmap_lock. Any new uses of this lock should
now go through the new mmap locking api. The mmap_lock is still
implemented as a rwsem, though this could change in the future.
[akpm@linux-foundation.org: fix it for mm-gup-might_lock_readmmap_sem-in-get_user_pages_fast.patch]
Link: http://lkml.kernel.org/r/20200520052908.204642-11-walken@google.com
Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Laurent Dufour <ldufour@linux.ibm.com>
Cc: Liam Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/ia64/mm/fault.c | 4 +-
arch/x86/mm/fault.c | 2 -
drivers/gpu/drm/etnaviv/etnaviv_gem.c | 2 -
include/linux/mm_types.h | 2 -
include/linux/mmap_lock.h | 38 ++++++++++++------------
mm/gup.c | 2 -
mm/memory.c | 2 -
mm/mmap.c | 4 +-
mm/mmu_notifier.c | 2 -
9 files changed, 29 insertions(+), 29 deletions(-)
--- a/arch/ia64/mm/fault.c~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/arch/ia64/mm/fault.c
@@ -74,8 +74,8 @@ ia64_do_page_fault (unsigned long addres
mask = ((((isr >> IA64_ISR_X_BIT) & 1UL) << VM_EXEC_BIT)
| (((isr >> IA64_ISR_W_BIT) & 1UL) << VM_WRITE_BIT));
- /* mmap_sem is performance critical.... */
- prefetchw(&mm->mmap_sem);
+ /* mmap_lock is performance critical.... */
+ prefetchw(&mm->mmap_lock);
/*
* If we're in an interrupt or have no user context, we must not take the fault..
--- a/arch/x86/mm/fault.c~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/arch/x86/mm/fault.c
@@ -1359,7 +1359,7 @@ dotraplinkage void
do_page_fault(struct pt_regs *regs, unsigned long hw_error_code,
unsigned long address)
{
- prefetchw(¤t->mm->mmap_sem);
+ prefetchw(¤t->mm->mmap_lock);
/*
* KVM has two types of events that are, logically, interrupts, but
* are unfortunately delivered using the #PF vector. These events are
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
@@ -661,7 +661,7 @@ static int etnaviv_gem_userptr_get_pages
struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr;
int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
- might_lock_read(¤t->mm->mmap_sem);
+ might_lock_read(¤t->mm->mmap_lock);
if (userptr->mm != current->mm)
return -EPERM;
--- a/include/linux/mmap_lock.h~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/include/linux/mmap_lock.h
@@ -4,67 +4,67 @@
#include <linux/mmdebug.h>
#define MMAP_LOCK_INITIALIZER(name) \
- .mmap_sem = __RWSEM_INITIALIZER((name).mmap_sem),
+ .mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),
static inline void mmap_init_lock(struct mm_struct *mm)
{
- init_rwsem(&mm->mmap_sem);
+ init_rwsem(&mm->mmap_lock);
}
static inline void mmap_write_lock(struct mm_struct *mm)
{
- down_write(&mm->mmap_sem);
+ down_write(&mm->mmap_lock);
}
static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
{
- down_write_nested(&mm->mmap_sem, subclass);
+ down_write_nested(&mm->mmap_lock, subclass);
}
static inline int mmap_write_lock_killable(struct mm_struct *mm)
{
- return down_write_killable(&mm->mmap_sem);
+ return down_write_killable(&mm->mmap_lock);
}
static inline bool mmap_write_trylock(struct mm_struct *mm)
{
- return down_write_trylock(&mm->mmap_sem) != 0;
+ return down_write_trylock(&mm->mmap_lock) != 0;
}
static inline void mmap_write_unlock(struct mm_struct *mm)
{
- up_write(&mm->mmap_sem);
+ up_write(&mm->mmap_lock);
}
static inline void mmap_write_downgrade(struct mm_struct *mm)
{
- downgrade_write(&mm->mmap_sem);
+ downgrade_write(&mm->mmap_lock);
}
static inline void mmap_read_lock(struct mm_struct *mm)
{
- down_read(&mm->mmap_sem);
+ down_read(&mm->mmap_lock);
}
static inline int mmap_read_lock_killable(struct mm_struct *mm)
{
- return down_read_killable(&mm->mmap_sem);
+ return down_read_killable(&mm->mmap_lock);
}
static inline bool mmap_read_trylock(struct mm_struct *mm)
{
- return down_read_trylock(&mm->mmap_sem) != 0;
+ return down_read_trylock(&mm->mmap_lock) != 0;
}
static inline void mmap_read_unlock(struct mm_struct *mm)
{
- up_read(&mm->mmap_sem);
+ up_read(&mm->mmap_lock);
}
static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
{
- if (down_read_trylock(&mm->mmap_sem)) {
- rwsem_release(&mm->mmap_sem.dep_map, _RET_IP_);
+ if (down_read_trylock(&mm->mmap_lock)) {
+ rwsem_release(&mm->mmap_lock.dep_map, _RET_IP_);
return true;
}
return false;
@@ -72,19 +72,19 @@ static inline bool mmap_read_trylock_non
static inline void mmap_read_unlock_non_owner(struct mm_struct *mm)
{
- up_read_non_owner(&mm->mmap_sem);
+ up_read_non_owner(&mm->mmap_lock);
}
static inline void mmap_assert_locked(struct mm_struct *mm)
{
- lockdep_assert_held(&mm->mmap_sem);
- VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_sem), mm);
+ lockdep_assert_held(&mm->mmap_lock);
+ VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
}
static inline void mmap_assert_write_locked(struct mm_struct *mm)
{
- lockdep_assert_held_write(&mm->mmap_sem);
- VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_sem), mm);
+ lockdep_assert_held_write(&mm->mmap_lock);
+ VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
}
#endif /* _LINUX_MMAP_LOCK_H */
--- a/include/linux/mm_types.h~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/include/linux/mm_types.h
@@ -440,7 +440,7 @@ struct mm_struct {
spinlock_t page_table_lock; /* Protects page tables and some
* counters
*/
- struct rw_semaphore mmap_sem;
+ struct rw_semaphore mmap_lock;
struct list_head mmlist; /* List of maybe swapped mm's. These
* are globally strung together off
--- a/mm/gup.c~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/mm/gup.c
@@ -2750,7 +2750,7 @@ static int internal_get_user_pages_fast(
return -EINVAL;
if (!(gup_flags & FOLL_FAST_ONLY))
- might_lock_read(¤t->mm->mmap_sem);
+ might_lock_read(¤t->mm->mmap_lock);
start = untagged_addr(start) & PAGE_MASK;
addr = start;
--- a/mm/memory.c~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/mm/memory.c
@@ -4804,7 +4804,7 @@ void __might_fault(const char *file, int
__might_sleep(file, line, 0);
#if defined(CONFIG_DEBUG_ATOMIC_SLEEP)
if (current->mm)
- might_lock_read(¤t->mm->mmap_sem);
+ might_lock_read(¤t->mm->mmap_lock);
#endif
}
EXPORT_SYMBOL(__might_fault);
--- a/mm/mmap.c~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/mm/mmap.c
@@ -3474,7 +3474,7 @@ static void vm_lock_anon_vma(struct mm_s
* The LSB of head.next can't change from under us
* because we hold the mm_all_locks_mutex.
*/
- down_write_nest_lock(&anon_vma->root->rwsem, &mm->mmap_sem);
+ down_write_nest_lock(&anon_vma->root->rwsem, &mm->mmap_lock);
/*
* We can safely modify head.next after taking the
* anon_vma->root->rwsem. If some other vma in this mm shares
@@ -3504,7 +3504,7 @@ static void vm_lock_mapping(struct mm_st
*/
if (test_and_set_bit(AS_MM_ALL_LOCKS, &mapping->flags))
BUG();
- down_write_nest_lock(&mapping->i_mmap_rwsem, &mm->mmap_sem);
+ down_write_nest_lock(&mapping->i_mmap_rwsem, &mm->mmap_lock);
}
}
--- a/mm/mmu_notifier.c~mmap-locking-api-rename-mmap_sem-to-mmap_lock
+++ a/mm/mmu_notifier.c
@@ -983,7 +983,7 @@ int mmu_interval_notifier_insert(struct
struct mmu_notifier_subscriptions *subscriptions;
int ret;
- might_lock(&mm->mmap_sem);
+ might_lock(&mm->mmap_lock);
subscriptions = smp_load_acquire(&mm->notifier_subscriptions);
if (!subscriptions || !subscriptions->has_itree) {
_
next prev parent reply other threads:[~2020-06-09 4:33 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-09 4:29 incoming Andrew Morton
2020-06-09 4:29 ` [patch 01/93] kallsyms/printk: add loglvl to print_ip_sym() Andrew Morton
2020-06-09 4:30 ` [patch 02/93] alpha: add show_stack_loglvl() Andrew Morton
2020-06-09 4:30 ` [patch 03/93] arc: " Andrew Morton
2020-06-09 4:30 ` [patch 04/93] arm/asm: add loglvl to c_backtrace() Andrew Morton
2020-06-09 4:30 ` [patch 05/93] arm: add loglvl to unwind_backtrace() Andrew Morton
2020-06-09 4:30 ` [patch 06/93] arm: add loglvl to dump_backtrace() Andrew Morton
2020-06-09 4:30 ` [patch 07/93] arm: wire up dump_backtrace_{entry,stm} Andrew Morton
2020-06-09 4:30 ` [patch 08/93] arm: add show_stack_loglvl() Andrew Morton
2020-06-09 4:30 ` [patch 09/93] arm64: add loglvl to dump_backtrace() Andrew Morton
2020-06-09 4:30 ` [patch 10/93] arm64: add show_stack_loglvl() Andrew Morton
2020-06-09 4:30 ` [patch 11/93] c6x: " Andrew Morton
2020-06-09 4:30 ` [patch 12/93] csky: " Andrew Morton
2020-06-09 4:30 ` [patch 13/93] h8300: " Andrew Morton
2020-06-09 4:30 ` [patch 14/93] hexagon: " Andrew Morton
2020-06-09 4:30 ` [patch 15/93] ia64: pass log level as arg into ia64_do_show_stack() Andrew Morton
2020-06-09 4:30 ` [patch 16/93] ia64: add show_stack_loglvl() Andrew Morton
2020-06-09 4:30 ` [patch 17/93] m68k: " Andrew Morton
2020-06-09 4:30 ` [patch 18/93] microblaze: add loglvl to microblaze_unwind_inner() Andrew Morton
2020-06-09 4:30 ` [patch 19/93] microblaze: add loglvl to microblaze_unwind() Andrew Morton
2020-06-09 4:30 ` [patch 20/93] microblaze: add show_stack_loglvl() Andrew Morton
2020-06-09 4:30 ` [patch 21/93] mips: " Andrew Morton
2020-06-09 4:31 ` [patch 22/93] nds32: " Andrew Morton
2020-06-09 4:31 ` [patch 23/93] nios2: " Andrew Morton
2020-06-09 4:31 ` [patch 24/93] openrisc: " Andrew Morton
2020-06-09 4:31 ` [patch 25/93] parisc: " Andrew Morton
2020-06-09 4:31 ` [patch 26/93] powerpc: " Andrew Morton
2020-06-09 4:31 ` [patch 27/93] riscv: " Andrew Morton
2020-06-09 4:31 ` [patch 28/93] s390: " Andrew Morton
2020-06-09 4:31 ` [patch 29/93] sh: add loglvl to dump_mem() Andrew Morton
2020-06-09 4:31 ` [patch 30/93] sh: remove needless printk() Andrew Morton
2020-06-09 4:31 ` [patch 31/93] sh: add loglvl to printk_address() Andrew Morton
2020-06-09 4:31 ` [patch 32/93] sh: add loglvl to show_trace() Andrew Morton
2020-06-09 4:31 ` [patch 33/93] sh: add show_stack_loglvl() Andrew Morton
2020-06-09 4:31 ` [patch 34/93] sparc: " Andrew Morton
2020-06-09 4:31 ` [patch 35/93] um/sysrq: remove needless variable sp Andrew Morton
2020-06-09 4:31 ` [patch 36/93] um: add show_stack_loglvl() Andrew Morton
2020-06-09 4:31 ` [patch 37/93] unicore32: remove unused pmode argument in c_backtrace() Andrew Morton
2020-06-09 4:31 ` [patch 38/93] unicore32: add loglvl to c_backtrace() Andrew Morton
2020-06-09 4:31 ` [patch 39/93] unicore32: add show_stack_loglvl() Andrew Morton
2020-06-09 4:31 ` [patch 40/93] x86: add missing const qualifiers for log_lvl Andrew Morton
2020-06-09 4:32 ` [patch 41/93] x86: add show_stack_loglvl() Andrew Morton
2020-06-09 4:32 ` [patch 42/93] xtensa: add loglvl to show_trace() Andrew Morton
2020-06-09 4:32 ` [patch 43/93] xtensa: add show_stack_loglvl() Andrew Morton
2020-06-09 4:32 ` [patch 44/93] sysrq: use show_stack_loglvl() Andrew Morton
2020-06-09 4:32 ` [patch 45/93] x86/amd_gart: print stacktrace for a leak with KERN_ERR Andrew Morton
2020-06-09 4:32 ` [patch 46/93] power: use show_stack_loglvl() Andrew Morton
2020-06-09 4:32 ` [patch 47/93] kdb: don't play with console_loglevel Andrew Morton
2020-06-09 4:32 ` [patch 48/93] sched: print stack trace with KERN_INFO Andrew Morton
2020-06-09 4:32 ` [patch 49/93] kernel: use show_stack_loglvl() Andrew Morton
2020-06-09 4:32 ` [patch 50/93] kernel: rename show_stack_loglvl() => show_stack() Andrew Morton
2020-06-09 4:32 ` [patch 51/93] mm: don't include asm/pgtable.h if linux/mm.h is already included Andrew Morton
2020-06-09 4:32 ` [patch 52/93] mm: introduce include/linux/pgtable.h Andrew Morton
2020-06-09 4:32 ` [patch 53/93] mm: reorder includes after introduction of linux/pgtable.h Andrew Morton
2020-06-09 4:32 ` [patch 54/93] csky: replace definitions of __pXd_offset() with pXd_index() Andrew Morton
2020-06-09 4:32 ` [patch 55/93] m68k/mm/motorola: move comment about page table allocation funcitons Andrew Morton
2020-06-09 4:32 ` [patch 56/93] m68k/mm: move {cache,nocahe}_page() definitions close to their user Andrew Morton
2020-06-09 4:33 ` [patch 57/93] x86/mm: simplify init_trampoline() and surrounding logic Andrew Morton
2020-06-09 4:33 ` [patch 58/93] mm: pgtable: add shortcuts for accessing kernel PMD and PTE Andrew Morton
2020-06-09 4:33 ` [patch 59/93] mm: consolidate pte_index() and pte_offset_*() definitions Andrew Morton
2020-06-09 4:33 ` [patch 60/93] mmap locking API: initial implementation as rwsem wrappers Andrew Morton
2020-06-09 4:33 ` [patch 61/93] MMU notifier: use the new mmap locking API Andrew Morton
2020-06-09 4:33 ` [patch 62/93] DMA reservations: " Andrew Morton
2020-06-09 4:33 ` [patch 63/93] mmap locking API: use coccinelle to convert mmap_sem rwsem call sites Andrew Morton
2020-06-09 4:33 ` [patch 64/93] mmap locking API: convert mmap_sem call sites missed by coccinelle Andrew Morton
2020-06-09 4:33 ` [patch 65/93] mmap locking API: convert nested write lock sites Andrew Morton
2020-06-09 4:33 ` [patch 66/93] mmap locking API: add mmap_read_trylock_non_owner() Andrew Morton
2020-06-09 4:33 ` [patch 67/93] mmap locking API: add MMAP_LOCK_INITIALIZER Andrew Morton
2020-06-09 4:33 ` [patch 68/93] mmap locking API: add mmap_assert_locked() and mmap_assert_write_locked() Andrew Morton
2020-06-09 4:33 ` Andrew Morton [this message]
2020-06-09 4:33 ` [patch 70/93] mmap locking API: convert mmap_sem API comments Andrew Morton
2020-06-09 4:33 ` [patch 71/93] mmap locking API: convert mmap_sem comments Andrew Morton
2020-06-09 4:33 ` [patch 72/93] maccess: unexport probe_kernel_write() Andrew Morton
2020-06-09 4:34 ` [patch 73/93] maccess: remove various unused weak aliases Andrew Morton
2020-06-09 4:34 ` [patch 74/93] maccess: remove duplicate kerneldoc comments Andrew Morton
2020-06-09 4:34 ` [patch 75/93] maccess: clarify " Andrew Morton
2020-06-09 4:34 ` [patch 76/93] maccess: update the top of file comment Andrew Morton
2020-06-09 4:34 ` [patch 77/93] maccess: rename strncpy_from_unsafe_user to strncpy_from_user_nofault Andrew Morton
2020-06-09 4:34 ` [patch 78/93] maccess: rename strncpy_from_unsafe_strict to strncpy_from_kernel_nofault Andrew Morton
2020-06-09 4:34 ` [patch 79/93] maccess: rename strnlen_unsafe_user to strnlen_user_nofault Andrew Morton
2020-06-09 4:34 ` [patch 80/93] maccess: remove probe_read_common and probe_write_common Andrew Morton
2020-06-09 4:34 ` [patch 81/93] maccess: unify the probe kernel arch hooks Andrew Morton
2020-06-09 4:34 ` [patch 82/93] bpf: factor out a bpf_trace_copy_string helper Andrew Morton
2020-06-09 4:34 ` [patch 83/93] bpf: handle the compat string in bpf_trace_copy_string better Andrew Morton
2020-06-09 4:34 ` [patch 84/93] bpf:bpf_seq_printf(): handle potentially unsafe format string better Andrew Morton
2020-06-09 4:34 ` [patch 85/93] bpf: rework the compat kernel probe handling Andrew Morton
2020-06-09 4:34 ` [patch 86/93] tracing/kprobes: handle mixed kernel/userspace probes better Andrew Morton
2020-06-09 4:34 ` [patch 87/93] maccess: remove strncpy_from_unsafe Andrew Morton
2020-06-09 4:34 ` [patch 88/93] maccess: always use strict semantics for probe_kernel_read Andrew Morton
2020-06-09 4:34 ` [patch 89/93] maccess: move user access routines together Andrew Morton
2020-06-09 4:34 ` [patch 90/93] maccess: allow architectures to provide kernel probing directly Andrew Morton
2020-06-09 4:35 ` [patch 91/93] x86: use non-set_fs based maccess routines Andrew Morton
2020-06-09 4:35 ` [patch 92/93] maccess: return -ERANGE when probe_kernel_read() fails Andrew Morton
2020-06-09 4:35 ` [patch 93/93] include/linux/cache.h: expand documentation over __read_mostly Andrew Morton
2020-06-09 4:44 ` + linux-next-rejects.patch added to -mm tree Andrew Morton
2020-06-09 5:34 ` mmotm 2020-06-08-22-33 uploaded Andrew Morton
2020-06-09 5:36 ` mmotm 2020-06-08-22-35 uploaded Andrew Morton
2020-06-09 22:26 ` + arch-sparc-mm-srmmuc-fix-build.patch added to -mm tree Andrew Morton
2020-06-09 22:49 ` + lib-fix-bitmap_parse-on-64-bit-big-endian-archs-fix.patch " Andrew Morton
2020-06-09 22:53 ` + scripts-spelling-recommend-blocklist-allowlist-instead-of-blacklist-whitelist.patch " Andrew Morton
2020-06-10 3:59 ` [folded-merged] ipc-convert-ipcs_idr-to-xarray-update.patch removed from " Andrew Morton
2020-06-10 3:59 ` [folded-merged] ipc-convert-ipcs_idr-to-xarray-update-fix.patch " Andrew Morton
2020-06-10 4:00 ` [to-be-updated] ipc-convert-ipcs_idr-to-xarray.patch " Andrew Morton
2020-06-10 21:03 ` [to-be-updated] scripts-spelling-recommend-blocklist-allowlist-instead-of-blacklist-whitelist.patch " Andrew Morton
2020-06-10 21:33 ` + arch-powerpc-mm-pgtablec-another-missed-conversion.patch added to " Andrew Morton
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