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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2006-12-30 22:24:19 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-01-08 19:49:54 +0000 |
| commit | a6f36be32622730710b2fadacb6e2649defa4371 (patch) | |
| tree | 09d0f3ebe839b76373ee5ed4674fe305ad9ac256 /Documentation | |
| parent | e47c222b22cd53c317a5573e1dc5f9e0cbd46380 (diff) | |
| download | lwn-a6f36be32622730710b2fadacb6e2649defa4371.tar.gz lwn-a6f36be32622730710b2fadacb6e2649defa4371.zip | |
[ARM] pass vma for flush_anon_page()
Since get_user_pages() may be used with processes other than the
current process and calls flush_anon_page(), flush_anon_page() has to
cope in some way with non-current processes.
It may not be appropriate, or even desirable to flush a region of
virtual memory cache in the current process when that is different to
the process that we want the flush to occur for.
Therefore, pass the vma into flush_anon_page() so that the architecture
can work out whether the 'vmaddr' is for the current process or not.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/cachetlb.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/cachetlb.txt b/Documentation/cachetlb.txt index 73e794f0ff09..debf6813934a 100644 --- a/Documentation/cachetlb.txt +++ b/Documentation/cachetlb.txt @@ -373,14 +373,15 @@ maps this page at its virtual address. likely that you will need to flush the instruction cache for copy_to_user_page(). - void flush_anon_page(struct page *page, unsigned long vmaddr) + void flush_anon_page(struct vm_area_struct *vma, struct page *page, + unsigned long vmaddr) When the kernel needs to access the contents of an anonymous page, it calls this function (currently only get_user_pages()). Note: flush_dcache_page() deliberately doesn't work for an anonymous page. The default implementation is a nop (and should remain so for all coherent architectures). For incoherent architectures, it should flush - the cache of the page at vmaddr in the current user process. + the cache of the page at vmaddr. void flush_kernel_dcache_page(struct page *page) When the kernel needs to modify a user page is has obtained |