From 0a3222338efc108c831fbdd719a47d35f4b0adcd Mon Sep 17 00:00:00 2001
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From: Khem Raj <raj.khem@gmail.com>
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Date: Wed, 18 Aug 2021 06:49:25 +0000
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Subject: [PATCH] aio_linux: Check if syscall exists before using it
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Return -ENOSYS if not implememented, fixes build on arches like RISCV32
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Fixes
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tpool/aio_linux.cc:63:20: error: '__NR_io_getevents' was not declared in this scope; did you mean 'io_getevents'?
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63 | int ret= syscall(__NR_io_getevents, reinterpret_cast<long>(ctx),
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| ^~~~~~~~~~~~~~~~~
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| io_getevents
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Upstream-Staus: Pending
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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---
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tpool/aio_linux.cc | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/tpool/aio_linux.cc b/tpool/aio_linux.cc
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index 4abc213..da75411 100644
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--- a/tpool/aio_linux.cc
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+++ b/tpool/aio_linux.cc
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@@ -58,6 +58,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111 - 1301 USA*/
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*/
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static int my_getevents(io_context_t ctx, long min_nr, long nr, io_event *ev)
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{
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+#ifdef __NR_io_getevents
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int saved_errno= errno;
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int ret= syscall(__NR_io_getevents, reinterpret_cast<long>(ctx),
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min_nr, nr, ev, 0);
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@@ -67,6 +68,9 @@ static int my_getevents(io_context_t ctx, long min_nr, long nr, io_event *ev)
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errno= saved_errno;
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}
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return ret;
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+#else
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+ return -ENOSYS;
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+#endif
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}
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--
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2.29.2
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