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path: root/arch/sparc/lib/atomic32.c
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2016-06-16locking/atomic, arch/sparc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()Peter Zijlstra
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) <peterz@infradead.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: James Y Knight <jyknight@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: sparclinux@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-07-27sparc: Provide atomic_{or,xor,and}Peter Zijlstra
Implement atomic logic ops -- atomic_{or,xor,and}. These will replace the atomic_{set,clear}_mask functions that are available on some archs. Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-11-07sparc32: Implement xchg and atomic_xchg using ATOMIC_HASH locksAndreas Larsson
Atomicity between xchg and cmpxchg cannot be guaranteed when xchg is implemented with a swap and cmpxchg is implemented with locks. Without this, e.g. mcs_spin_lock and mcs_spin_unlock are broken. Signed-off-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-14locking,arch,sparc: Fold atomic_opsPeter Zijlstra
Many of the atomic op implementations are the same except for one instruction; fold the lot into a few CPP macros and reduce LoC. This also prepares for easy addition of new ops. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Kirill Tkhai <tkhai@yandex.ru> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: sparclinux@vger.kernel.org Link: http://lkml.kernel.org/r/20140508135852.825281379@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2011-08-04sparc: Fix __atomic_add_unless() return value.Josip Rodin
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-27sparc: rename atomic_add_unlessStephen Rothwell
Should have been done in commit 1af08a1407f4 ("This is in preparation for more generic atomic"). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Arun Sharma <asharma@fb.com> Cc: David Miller <davem@davemloft.net> Cc: "Hans-Christian Egtvedt" <hans-christian.egtvedt@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26atomic: use <linux/atomic.h>Arun Sharma
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-27sparc: Replace deprecated spinlock initializationThomas Gleixner
SPIN_LOCK_UNLOCK is deprecated. Use the lockdep capable variant instead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: David S. Miller <davem@davemloft.net>
2007-05-31[SPARC32]: Build fix.Andrew Morton
Fix 6197fe4d720ea3e2ee94cdc7ef32d6c0151199de arch/sparc/lib/atomic32.c: In function '__cmpxchg_u32': arch/sparc/lib/atomic32.c:127: error: 'addr' undeclared (first use in this function) arch/sparc/lib/atomic32.c:127: error: (Each undeclared identifier is reported only once arch/sparc/lib/atomic32.c:127: error: for each function it appears in.) I assume this is what was intended.. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: William Irwin <wli@holomorphy.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-05-29[SPARC]: Emulate cmpxchg like pariscKyle McMartin
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-26[SPARC32]: Fix SMP build regressionRobert Reif
commit b19cbe2a1695c09c74f83646c4b82b51123b3690 [BRIDGE]: Fix fdb RCU race breaks sparc SMP build because atomic_add_unless is not exported. This patch exports atomic_add_unless and atomic_cmpxchg. Signed-off-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-17[SPARC]: Make bitops use same spinlocks as atomics.David S. Miller
Recent workqueue changes basically make this a formal requirement. Also, move atomic32.o from lib-y to obj-y since it exports symbols to modules. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-12-12[SPARC]: atomic_clear_mask build fixPaul Jackson
This fixes one build error introduced in sparc with the patch of Oct 30, resent Nov 4 "[patch 3/5] atomic: atomic_inc_not_zero" I still can't get sparc to build, but at least it gets further after I remove this line. Apparently, this change was agreed to by Andrew and Nick on Nov 14, but everyone thought someone else was doing it. Signed-off-by: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-11-13[PATCH] atomic: inc_not_zeroNick Piggin
Introduce an atomic_inc_not_zero operation. Make this a special case of atomic_add_unless because lockless pagecache actually wants atomic_inc_not_negativeone due to its offset refcount. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-13[PATCH] atomic: cmpxchgNick Piggin
Introduce an atomic_cmpxchg operation. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-09[PATCH] more SPIN_LOCK_UNLOCKED -> DEFINE_SPINLOCK conversionsIngo Molnar
This converts the final 20 DEFINE_SPINLOCK holdouts. (another 580 places are already using DEFINE_SPINLOCK). Build tested on x86. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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