fs: check FMODE_WRITE in __kernel_write

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Add a WARN_ON_ONCE if the file isn't actually open for write.  This
matches the check done in vfs_write, but actually warn warns as a
kernel user calling write on a file not opened for writing is a pretty
obvious programming error.

Signed-off-by: Christoph Hellwig <hch@lst.de>

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Christoph Hellwig 2020-05-08 08:55:03 +02:00

parent 9db9775224

commit a01ac27be4

1 changed files with 2 additions and 0 deletions

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fs/read_write.c

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