[PATCH] mm: page_state comment more
Clarify that preemption needs to be guarded against with the __xxx_page_state functions. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -86,8 +86,9 @@
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* - The __xxx_page_state variants can be used safely when interrupts are
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* - The __xxx_page_state variants can be used safely when interrupts are
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* disabled.
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* disabled.
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* - The __xxx_page_state variants can be used if the field is only
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* - The __xxx_page_state variants can be used if the field is only
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* modified from process context, or only modified from interrupt context.
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* modified from process context and protected from preemption, or only
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* In this case, the field should be commented here.
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* modified from interrupt context. In this case, the field should be
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* commented here.
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*/
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*/
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struct page_state {
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struct page_state {
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unsigned long nr_dirty; /* Dirty writeable pages */
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unsigned long nr_dirty; /* Dirty writeable pages */
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