Michal Kubecek
395e1b04b9
Since commit 11c5ad0ec441 ("eventpoll: switch to ->poll_mask") in
v4.18-rc1, eventpoll switched from ->poll() to ->poll_mask(). Rather than
calling the callback directly (which would result in null pointer
dereference), use vfs_poll() wrapper. As this wrapper is only available
since 4.18-rc1 cycle as well, provide a copy to use when building against
older kernels.
31 lines
566 B
C
31 lines
566 B
C
#ifndef __COMPAT_POLL_H__
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#define __COMPAT_POLL_H__
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#include <linux/poll.h>
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0))
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#ifndef __poll_t
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typedef unsigned int __poll_t;
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#endif
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static inline __poll_t compat_vfs_poll(struct file *file,
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struct poll_table_struct *pt)
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{
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if (unlikely(!file->f_op->poll))
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return DEFAULT_POLLMASK;
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return file->f_op->poll(file, pt);
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}
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#else
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static inline __poll_t compat_vfs_poll(struct file *file,
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struct poll_table_struct *pt)
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{
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return vfs_poll(file, pt);
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}
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#endif
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#endif /* __COMPAT_POLL_H__ */
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