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ce335e0723
Actually we seldom use the class_idx returned from get_zspage_mapping(), only the zspage->fullness is useful, just use zspage->fullness to remove this helper. Note zspage->fullness is not stable outside pool->lock, remove redundant "VM_BUG_ON(fullness != ZS_INUSE_RATIO_0)" in async_free_zspage() since we already have the same VM_BUG_ON() in __free_zspage(), which is safe to access zspage->fullness with pool->lock held. Link: https://lkml.kernel.org/r/20240220-b4-zsmalloc-cleanup-v1-3-5c5ee4ccdd87@bytedance.com Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Yosry Ahmed <yosryahmed@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.