kernel.git/arch/parisc/include/asm/atomic.h, branch linux-4.10.y

locking/atomic: Remove linux/atomic.h:atomic_fetch_or()

2016-06-16T08:48:32Z

Since all architectures have this implemented now natively, remove this dead code. Signed-off-by: Peter Zijlstra (Intel) Cc: Andrew Morton Cc: Linus Torvalds Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

locking/atomic, arch/parisc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()

2016-06-16T08:48:28Z

Implement FETCH-OP atomic primitives, these are very similar to the existing OP-RETURN primitives we already have, except they return the value of the atomic variable _before_ modification. This is especially useful for irreversible operations -- such as bitops (because it becomes impossible to reconstruct the state prior to modification). Signed-off-by: Peter Zijlstra (Intel) Cc: Andrew Morton Cc: Helge Deller Cc: James E.J. Bottomley Cc: Linus Torvalds Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-parisc@vger.kernel.org Signed-off-by: Ingo Molnar

atomic, arch: Audit atomic_{read,set}()

2015-09-23T07:54:28Z

This patch makes sure that atomic_{read,set}() are at least {READ,WRITE}_ONCE(). We already had the 'requirement' that atomic_read() should use ACCESS_ONCE(), and most archs had this, but a few were lacking. All are now converted to use READ_ONCE(). And, by a symmetry and general paranoia argument, upgrade atomic_set() to use WRITE_ONCE(). Signed-off-by: Peter Zijlstra (Intel) Cc: Andrew Morton Cc: Dmitry Vyukov Cc: Linus Torvalds Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: james.hogan@imgtec.com Cc: linux-kernel@vger.kernel.org Cc: oleg@redhat.com Cc: will.deacon@arm.com Signed-off-by: Ingo Molnar

atomic: Provide atomic_{or,xor,and}

2015-07-27T12:06:24Z

Implement atomic logic ops -- atomic_{or,xor,and}. These will replace the atomic_{set,clear}_mask functions that are available on some archs. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Thomas Gleixner

parisc: Provide atomic_{or,xor,and}

2015-07-27T12:06:23Z

locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()

2014-10-03T04:06:23Z

Use the much more reader friendly ACCESS_ONCE() instead of the cast to volatile. This is purely a stylistic change. Signed-off-by: Pranith Kumar Acked-by: Jesper Nilsson Acked-by: Hans-Christian Egtvedt Acked-by: Max Filippov Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: linux-arch@vger.kernel.org Link: http://lkml.kernel.org/r/1411482607-20948-1-git-send-email-bobby.prani@gmail.com Signed-off-by: Ingo Molnar

locking,arch,parisc: Fold atomic_ops

2014-08-14T10:48:11Z

OK, no LoC saved in this case because sub was defined in terms of add. Still do it because this also prepares for easy addition of new ops. Signed-off-by: Peter Zijlstra Cc: Helge Deller Cc: James E.J. Bottomley Cc: Linus Torvalds Cc: Paul E. McKenney Cc: linux-parisc@vger.kernel.org Link: http://lkml.kernel.org/r/20140508135852.659342353@infradead.org Signed-off-by: Ingo Molnar

arch,parisc: Convert smp_mb__*()

2014-04-18T12:20:41Z

parisc fully relies on asm-generic/barrier.h, therefore its smp_mb() is barrier and the default implementation suffices. Signed-off-by: Peter Zijlstra Acked-by: Paul E. McKenney Link: http://lkml.kernel.org/n/tip-mxs4aubiyesi79v8xx53093q@git.kernel.org Cc: Helge Deller Cc: James E.J. Bottomley Cc: Linus Torvalds Cc: linux-kernel@vger.kernel.org Cc: linux-parisc@vger.kernel.org Signed-off-by: Ingo Molnar

parisc: implement atomic64_dec_if_positive()

2013-05-06T21:10:04Z

Signed-off-by: Helge Deller

parisc: fix compile warnings triggered by atomic_sub(sizeof(),v)

2013-03-02T19:01:05Z

This fixes compile warnings like this one: net/ipv4/igmp.c: In function ‘ip_mc_leave_group’: net/ipv4/igmp.c:1898:3: warning: overflow in implicit constant conversion [-Woverflow] atomic_sub() is defined as __atomic_add_return(-(VAL),(v)))) and if VAL is of type unsigned int (as returned by sizeof()), negating this value will overflow. Fix this by type-casting VAL to int type. Signed-off-by: Helge Deller