Driver porting: Zero-copy user-space access

Driver porting: Zero-copy user-space access

Posted Mar 3, 2004 7:55 UTC (Wed) by bhepple (guest, #2581)
Parent article: Driver porting: Zero-copy user-space access

Hmmm, a quick recursive grep through the 2.6.3 driver source and include files showed exactly 0 users of set_page_dirty_lock() and 1 user of put_page() (in drivers/char/agp/generic.c)

There _is_ a
#define page_cache_release(page) put_page(page)
in include/linux/pagemap.h and it is quite a popular little chap in the device driver code with 13 hits in the entire tree.

Am I missing something or should we be using page_cache_release instead of put_page and is it (and set_page_dirty_lock) _really_ needed after all - I can hardly believe all those drivers are causing "data corruption and grumpy users"...

---

(Log in to post comments)