FUNCTION::MAJOR(3stap) Device Tapset FUNCTION::MAJOR(3stap)

# [NAME](#NAME)

function::MAJOR - Extract major device number from a kernel device number (kdev\_t)

# [SYNOPSIS](#SYNOPSIS)

```


    MAJOR:long(dev:long)
```

# [ARGUMENTS](#ARGUMENTS)

*dev*

Kernel device number to query.

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::dev*(3stap)](/man/enterprise-packages/systemtap/tapset::dev.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: function::MAJOR(3stap) from systemtap 5.6-r0 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git