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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 /arch/arm/lib
parent0adf65f53aae86aa86d8dccada02890545de8938 (diff)
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 'arch/arm/lib')
-rw-r--r--arch/arm/lib/uaccess_with_memcpy.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/arm/lib/uaccess_with_memcpy.c b/arch/arm/lib/uaccess_with_memcpy.c
index d72b14c96670..106f83a5ea6d 100644
--- a/arch/arm/lib/uaccess_with_memcpy.c
+++ b/arch/arm/lib/uaccess_with_memcpy.c
@@ -101,7 +101,7 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n)
atomic = faulthandler_disabled();
if (!atomic)
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
while (n) {
pte_t *pte;
spinlock_t *ptl;
@@ -109,11 +109,11 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n)
while (!pin_page_for_write(to, &pte, &ptl)) {
if (!atomic)
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
if (__put_user(0, (char __user *)to))
goto out;
if (!atomic)
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
}
tocopy = (~(unsigned long)to & ~PAGE_MASK) + 1;
@@ -133,7 +133,7 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n)
spin_unlock(ptl);
}
if (!atomic)
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
out:
return n;
@@ -170,17 +170,17 @@ __clear_user_memset(void __user *addr, unsigned long n)
return 0;
}
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
while (n) {
pte_t *pte;
spinlock_t *ptl;
int tocopy;
while (!pin_page_for_write(addr, &pte, &ptl)) {
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
if (__put_user(0, (char __user *)addr))
goto out;
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
}
tocopy = (~(unsigned long)addr & ~PAGE_MASK) + 1;
@@ -198,7 +198,7 @@ __clear_user_memset(void __user *addr, unsigned long n)
else
spin_unlock(ptl);
}
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
out:
return n;