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um: falloc.h needs to be directly included for older libc

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When building UML with glibc 2.17 installed, compilation
of arch/um/os-Linux/file.c fails due to failure to find
FALLOC_FL_PUNCH_HOLE and FALLOC_FL_KEEP_SIZE definitions.

It appears that /usr/include/bits/fcntl-linux.h (indirectly
included by /usr/include/fcntl.h) does not include falloc.h
with an older glibc, whereas a more up-to-date version
does.

Adding the direct include to file.c resolves the issue
and does not cause problems for more recent glibc.

Fixes: 50109b5a03 ("um: Add support for DISCARD in the UBD Driver")
Cc: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Alan Maguire 2020-03-17 17:35:34 +00:00 committed by Richard Weinberger
parent e355b2f55e
commit 35f3401317
1 changed files with 1 additions and 0 deletions
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arch/um/os-Linux/file.c
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@ -8,6 +8,7 @@
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <linux/falloc.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/socket.h>