Messages in this thread | | | From | Damian Hobson-Garcia <> | Subject | [PATCH v3 0/1] Generalize poll events from eventfd | Date | Thu, 15 Oct 2015 10:42:07 +0900 |
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Using eventfd user space can generate POLLIN/POLLOUT events but some applications may want to generate POLLPRI/POLLERR events as well. This patch submission aims to generalize the events generated by an eventfd. This is a resubmission of a patch from Feb 2013[1]. The original discussion trailed off without any conclusion, but the original author has recently confirmed[2] that this functionality is still useful, so I volunteered to rebase and resubmit the patch for discussion.
[1] https://lkml.org/lkml/2013/2/18/147 [2] https://lkml.org/lkml/2015/7/9/153
Changes in v3 ------------- * replace efd_mask structure with scalar 'events' variable.
Changes in v2 -------------
* rebased on Linux v4.3-rc1 * Move file operation implementations for EFD_MASK to a seperate structure * Remove 'data' element from efd_mask structure * read() is no longer supported when EFD_MASK is set (fails with EINVAL) * eventfd_ctx_fileget() now returns EINVAL when EFD_MASK is set, eliminating the possibility of triggering the orginal BUG_ON() macros which have now been removed.
Thank you, Damian
Martin Sustrik (1): eventfd: implementation of EFD_MASK flag
fs/eventfd.c | 91 ++++++++++++++++++++++++++++++++++++++------ include/linux/eventfd.h | 16 +------- include/uapi/linux/eventfd.h | 40 +++++++++++++++++++ 3 files changed, 121 insertions(+), 26 deletions(-) create mode 100644 include/uapi/linux/eventfd.h
-- 1.9.1
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