W-M-R opened a new pull request, #21354:
URL: https://github.com/apache/nuttx/pull/21354
## Summary
- `drivers/misc/dev_mem.c`: implement `seek()` for `/dev/mem`. Without it the
file could not be repositioned, so only the first read worked. `f_pos` is
now an offset inside the selected memory region instead of an absolute
address, which also makes `read()`/`write()` stay within that region.
- `drivers/video/mipidsi/mipi_dsi_host.c`: when `realloc()` fails, keep the
old host array and return `-ENOMEM` instead of losing the only pointer to
the previously allocated hosts.
- `drivers/note/Kconfig`, `drivers/note/note_driver.c`: add
`CONFIG_DRIVERS_NOTE_CPUID` so the CPUID is recorded in note events only
when the board provides a stable one.
## Impact
- `/dev/mem` seek semantics change; users that relied on `f_pos` being an
absolute address must be updated.
- New Kconfig option defaults to off; existing note output is unchanged.
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