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Groups > linux.kernel > #1586084
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v3 10/25] openrisc: add spinlock implementation |
| Date | 2017-02-22 12:30 +0100 |
| Message-ID | <tdDho-V3-19@gated-at.bofh.it> (permalink) |
| References | <tdo8F-6Sm-3@gated-at.bofh.it> <tdoim-6Y4-33@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Feb 22, 2017 at 04:11:39AM +0900, Stafford Horne wrote: > + __asm__ __volatile__( > + "1: l.lwa %0, 0(%3) \n" > + " l.srli %1, %0, 16 \n" > + " l.andi %2, %0, 0xffff \n" > + " l.sfeq %1, %2 \n" > + " l.bnf 1f \n" > + " l.ori %1, r0, 1 \n" > + " l.add %0, %0, %4 \n" > + " l.swa 0(%3), %0 \n" > + " l.bnf 1b \n" > + " l.ori %1, r0, 0 \n" > + "1: \n" > + : "=&r" (slock), "=&r" (contended), "=&r" (tmp) > + : "r" (&lock->slock), "r" (1 << TICKET_SHIFT) > + : "cc", "memory"); > + __asm__ __volatile__( > + "1: l.lwa %0, 0(%1) \n" > + " l.sfeqi %0, 0 \n" > + " l.bnf 1f \n" > + " l.nop \n" > + " l.swa 0(%1), %2 \n" > + " l.bnf 1b \n" > + " l.nop \n" > + "1: \n" > + : "=&r" (tmp) > + : "r" (&rw->lock), "r" (0x80000000) > + : "cc", "memory"); > + __asm__ __volatile__( > + "1: l.lwa %0, 0(%1) \n" > + " l.sfeqi %0, 0 \n" > + " l.bnf 1f \n" > + " l.nop \n" > + " l.swa 0(%1), %2 \n" > + " l.bnf 1b \n" > + " l.nop \n" > + "1: \n" > + : "=&r" (contended) > + : "r" (&rw->lock), "r" (0x80000000) > + : "cc", "memory"); > + __asm__ __volatile__( > + "1: l.lwa %0, 0(%1) \n" > + " l.sfltsi %0, -1 \n" > + " l.bf 1f \n" > + " l.addi %0, %0, 1 \n" > + " l.swa 0(%1), %0 \n" > + " l.bnf 1b \n" > + " l.nop \n" > + "1: \n" > + : "=&r" (contended) > + : "r" (&rw->lock) > + : "cc", "memory"); More asm with 'duplicate' labels.
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[PATCH v3 00/25] OpenRISC patches for 4.11 final call Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 16/25] openrisc: Add optimized memcpy routine Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 13/25] openrisc: Fix the bitmask for the unit present register Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 05/25] openrisc: head: refactor out tlb flush into it's own function Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 23/25] arch/openrisc/lib/memcpy.c: use correct OR1200 option Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 19/25] scripts/checkstack.pl: Add openrisc support Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 24/25] openrisc: Export ioremap symbols used by modules Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 21/25] openrisc: entry: Fix delay slot detection Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 04/25] openrisc: head: use THREAD_SIZE instead of magic constant Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 02/25] openrisc: add cache way information to cpuinfo Stafford Horne <shorne@gmail.com> - 2017-02-21 20:20 +0100
[PATCH v3 14/25] openrisc: Initial support for the idle state Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
Re: [PATCH v3 14/25] openrisc: Initial support for the idle state Joe Perches <joe@perches.com> - 2017-02-21 21:30 +0100
Re: [PATCH v3 14/25] openrisc: Initial support for the idle state Stafford Horne <shorne@gmail.com> - 2017-02-22 15:20 +0100
[PATCH v3 18/25] MAINTAINERS: Add the openrisc official repository Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
[PATCH v3 07/25] openrisc: add atomic bitops Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
[PATCH v3 09/25] openrisc: add optimized atomic operations Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
Re: [PATCH v3 09/25] openrisc: add optimized atomic operations Peter Zijlstra <peterz@infradead.org> - 2017-02-22 12:30 +0100
Re: [PATCH v3 09/25] openrisc: add optimized atomic operations Stafford Horne <shorne@gmail.com> - 2017-02-22 15:30 +0100
Re: [OpenRISC] [PATCH v3 09/25] openrisc: add optimized atomic operations Richard Henderson <rth@twiddle.net> - 2017-02-22 18:40 +0100
Re: [OpenRISC] [PATCH v3 09/25] openrisc: add optimized atomic operations Stafford Horne <shorne@gmail.com> - 2017-02-22 23:50 +0100
[PATCH v3 11/25] openrisc: add futex_atomic_* implementations Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
[PATCH v3 17/25] openrisc: Add .gitignore Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
[PATCH v3 08/25] openrisc: add cmpxchg and xchg implementations Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
Re: [PATCH v3 08/25] openrisc: add cmpxchg and xchg implementations Peter Zijlstra <peterz@infradead.org> - 2017-02-22 12:30 +0100
Re: [PATCH v3 08/25] openrisc: add cmpxchg and xchg implementations Stafford Horne <shorne@gmail.com> - 2017-02-22 15:30 +0100
Re: [OpenRISC] [PATCH v3 08/25] openrisc: add cmpxchg and xchg implementations Richard Henderson <rth@twiddle.net> - 2017-02-22 18:40 +0100
Re: [OpenRISC] [PATCH v3 08/25] openrisc: add cmpxchg and xchg implementations Stafford Horne <shorne@gmail.com> - 2017-02-22 23:50 +0100
[PATCH v3 10/25] openrisc: add spinlock implementation Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
Re: [PATCH v3 10/25] openrisc: add spinlock implementation Peter Zijlstra <peterz@infradead.org> - 2017-02-22 12:30 +0100
Re: [PATCH v3 10/25] openrisc: add spinlock implementation Peter Zijlstra <peterz@infradead.org> - 2017-02-22 12:40 +0100
Re: [PATCH v3 10/25] openrisc: add spinlock implementation Peter Zijlstra <peterz@infradead.org> - 2017-02-22 12:40 +0100
Re: [PATCH v3 10/25] openrisc: add spinlock implementation Peter Zijlstra <peterz@infradead.org> - 2017-02-22 13:10 +0100
Re: [PATCH v3 10/25] openrisc: add spinlock implementation Peter Zijlstra <peterz@infradead.org> - 2017-02-22 12:40 +0100
Re: [PATCH v3 10/25] openrisc: add spinlock implementation Peter Zijlstra <peterz@infradead.org> - 2017-02-22 12:50 +0100
Re: [PATCH v3 10/25] openrisc: add spinlock implementation Peter Zijlstra <peterz@infradead.org> - 2017-02-22 13:10 +0100
[PATCH v3 20/25] openrisc: entry: Whitespace and comment cleanups Stafford Horne <shorne@gmail.com> - 2017-02-21 20:30 +0100
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