Re: [RFC PATCH for 4.17 02/21] rseq: Introduce restartable sequences system call (v12)
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From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: 2018-03-28 14:26:16
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----- On Mar 28, 2018, at 7:22 AM, Peter Zijlstra peterz@infradead.org wrote:
On Tue, Mar 27, 2018 at 12:05:23PM -0400, Mathieu Desnoyers wrote:quoted
+/* + * struct rseq_cs is aligned on 4 * 8 bytes to ensure it is always + * contained within a single cache-line. It is usually declared as + * link-time constant data. + */ +struct rseq_cs { + /* Version of this structure. */ + uint32_t version; + /* enum rseq_cs_flags */ + uint32_t flags; + LINUX_FIELD_u32_u64(start_ip); + /* Offset from start_ip. */ + LINUX_FIELD_u32_u64(post_commit_offset); + LINUX_FIELD_u32_u64(abort_ip); +} __attribute__((aligned(4 * sizeof(uint64_t))));What's with the uint32_t ? The normal Linux API type is __u32 afaik.
Will fix. Working on both kernel and user-space code in parallel kind of does that to the brain. ;-) Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com