[PATCH v6 8/8] block: mark BIO_MAX_SIZE as obsolete
From: Ming Lei <hidden>
Date: 2016-05-30 13:36:54
Also in:
lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Some in-tree drivers may use big bio which size is more than BIO_MAX_SIZE, also the macro is seldom used in tree. So mark it as obsolete now, and it doesn't make sense after multipage bvec is introduced. Signed-off-by: Ming Lei <redacted> --- include/linux/bio.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index fb59a06..b284595 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h@@ -41,6 +41,13 @@ #endif #define BIO_MAX_PAGES 256 + +/* + * This is obsolete now and shouldn't be used, and the macro + * doesn't make any sense especially when multipage bvecs is + * supported. Even now some drivers may pass big bio which size + * is more than the value, such as bcache. + */ #define BIO_MAX_SIZE (BIO_MAX_PAGES << PAGE_SHIFT) /*
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1.9.1