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authorMichel Lespinasse <walken@google.com>2020-06-08 21:33:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-09 09:39:14 -0700
commitd8ed45c5dcd455fc5848d47f86883a1b872ac0d0 (patch)
treef9270b32da5f3f7be73b086c99d3dfc29a13161a /drivers/misc
parent0adf65f53aae86aa86d8dccada02890545de8938 (diff)
downloadlinux-d8ed45c5dcd455fc5848d47f86883a1b872ac0d0.tar.bz2
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
This change converts the existing mmap_sem rwsem calls to use the new mmap locking API instead. The change is generated using coccinelle with the following rule: // spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir . @@ expression mm; @@ ( -init_rwsem +mmap_init_lock | -down_write +mmap_write_lock | -down_write_killable +mmap_write_lock_killable | -down_write_trylock +mmap_write_trylock | -up_write +mmap_write_unlock | -downgrade_write +mmap_write_downgrade | -down_read +mmap_read_lock | -down_read_killable +mmap_read_lock_killable | -down_read_trylock +mmap_read_trylock | -up_read +mmap_read_unlock ) -(&mm->mmap_sem) +(mm) Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Davidlohr Bueso <dbueso@suse.de> 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: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/cxl/cxllib.c4
-rw-r--r--drivers/misc/cxl/fault.c4
-rw-r--r--drivers/misc/sgi-gru/grufault.c16
-rw-r--r--drivers/misc/sgi-gru/grufile.c4
4 files changed, 14 insertions, 14 deletions
diff --git a/drivers/misc/cxl/cxllib.c b/drivers/misc/cxl/cxllib.c
index 258c43a95ac3..a2c0fbb5eb28 100644
--- a/drivers/misc/cxl/cxllib.c
+++ b/drivers/misc/cxl/cxllib.c
@@ -207,7 +207,7 @@ static int get_vma_info(struct mm_struct *mm, u64 addr,
struct vm_area_struct *vma = NULL;
int rc = 0;
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
vma = find_vma(mm, addr);
if (!vma) {
@@ -218,7 +218,7 @@ static int get_vma_info(struct mm_struct *mm, u64 addr,
*vma_start = vma->vm_start;
*vma_end = vma->vm_end;
out:
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
return rc;
}
diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c
index 2297e6fc1544..01153b74334a 100644
--- a/drivers/misc/cxl/fault.c
+++ b/drivers/misc/cxl/fault.c
@@ -321,7 +321,7 @@ static void cxl_prefault_vma(struct cxl_context *ctx)
return;
}
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
for (ea = vma->vm_start; ea < vma->vm_end;
ea = next_segment(ea, slb.vsid)) {
@@ -336,7 +336,7 @@ static void cxl_prefault_vma(struct cxl_context *ctx)
last_esid = slb.esid;
}
}
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
mmput(mm);
}
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index ddd7312e7c0c..8f4e2895b565 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -68,14 +68,14 @@ static struct gru_thread_state *gru_find_lock_gts(unsigned long vaddr)
struct vm_area_struct *vma;
struct gru_thread_state *gts = NULL;
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
vma = gru_find_vma(vaddr);
if (vma)
gts = gru_find_thread_state(vma, TSID(vaddr, vma));
if (gts)
mutex_lock(&gts->ts_ctxlock);
else
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
return gts;
}
@@ -85,7 +85,7 @@ static struct gru_thread_state *gru_alloc_locked_gts(unsigned long vaddr)
struct vm_area_struct *vma;
struct gru_thread_state *gts = ERR_PTR(-EINVAL);
- down_write(&mm->mmap_sem);
+ mmap_write_lock(mm);
vma = gru_find_vma(vaddr);
if (!vma)
goto err;
@@ -94,11 +94,11 @@ static struct gru_thread_state *gru_alloc_locked_gts(unsigned long vaddr)
if (IS_ERR(gts))
goto err;
mutex_lock(&gts->ts_ctxlock);
- downgrade_write(&mm->mmap_sem);
+ mmap_write_downgrade(mm);
return gts;
err:
- up_write(&mm->mmap_sem);
+ mmap_write_unlock(mm);
return gts;
}
@@ -108,7 +108,7 @@ err:
static void gru_unlock_gts(struct gru_thread_state *gts)
{
mutex_unlock(&gts->ts_ctxlock);
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
}
/*
@@ -574,9 +574,9 @@ static irqreturn_t gru_intr(int chiplet, int blade)
*/
gts->ustats.fmm_tlbmiss++;
if (!gts->ts_force_cch_reload &&
- down_read_trylock(&gts->ts_mm->mmap_sem)) {
+ mmap_read_trylock(gts->ts_mm)) {
gru_try_dropin(gru, gts, tfh, NULL);
- up_read(&gts->ts_mm->mmap_sem);
+ mmap_read_unlock(gts->ts_mm);
} else {
tfh_user_polling_mode(tfh);
STAT(intr_mm_lock_failed);
diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index 9d042310214f..93bb49ddda1f 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -135,7 +135,7 @@ static int gru_create_new_context(unsigned long arg)
if (!(req.options & GRU_OPT_MISS_MASK))
req.options |= GRU_OPT_MISS_FMM_INTR;
- down_write(&current->mm->mmap_sem);
+ mmap_write_lock(current->mm);
vma = gru_find_vma(req.gseg);
if (vma) {
vdata = vma->vm_private_data;
@@ -146,7 +146,7 @@ static int gru_create_new_context(unsigned long arg)
vdata->vd_tlb_preload_count = req.tlb_preload_count;
ret = 0;
}
- up_write(&current->mm->mmap_sem);
+ mmap_write_unlock(current->mm);
return ret;
}