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signal/timer/event fds: anonymous inode source

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This patch add an anonymous inode source, to be used for files that need
and inode only in order to create a file*. We do not care of having an
inode for each file, and we do not even care of having different names in
the associated dentries (dentry names will be same for classes of file*).
This allow code reuse, and will be used by epoll, signalfd and timerfd
(and whatever else there'll be).

Signed-off-by: Davide Libenzi <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Davide Libenzi 2007-05-10 22:23:11 -07:00 • committed by Linus Torvalds
commit 5dc8bf8132
5 changed files with 228 additions and 0 deletions
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10
init/Kconfig
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@ -475,9 +475,19 @@ config FUTEX
support for "fast userspace mutexes". The resulting kernel may not
run glibc-based applications correctly.
config ANON_INODES
bool "Enable anonymous inode source" if EMBEDDED
default y
help
Anonymous inode source for pseudo-files like epoll, signalfd,
timerfd and eventfd.
If unsure, say Y.
config EPOLL
bool "Enable eventpoll support" if EMBEDDED
default y
depends on ANON_INODES
help
Disabling this option will cause the kernel to be built without
support for epoll family of system calls.