1D_INVALIDATE(9)                  The Linux VFS                 D_INVALIDATE(9)
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NAME

6       d_invalidate - detach submounts, prune dcache, and drop
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SYNOPSIS

9       int d_invalidate(struct dentry * dentry);
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ARGUMENTS

12       dentry
13           dentry to invalidate (aka detach, prune and drop)
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DESCRIPTION

16       no dcache lock.
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18       The final d_drop is done as an atomic operation relative to rename_lock
19       ensuring there are no races with d_set_mounted. This ensures there are
20       no unhashed dentries on the path to a mountpoint.
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23Kernel Hackers Manual 3.10         June 2019                   D_INVALIDATE(9)
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