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lfs: correct documentation on lookahead-related values

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The size of the lookahead buffer is required to be a multiple of 8 bytes
in anticipation of a future improvement.  The buffer itself need only be
aligned to support access through a uint32_t pointer.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
This commit is contained in:
Peter A. Bigot
2019-07-23 11:05:04 -05:00
parent abd90cb84c
commit eb013e6dd6
1 changed files with 2 additions and 2 deletions
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4
lfs.h
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@@ -204,7 +204,7 @@ struct lfs_config {
// Size of the lookahead buffer in bytes. A larger lookahead buffer // Size of the lookahead buffer in bytes. A larger lookahead buffer
// increases the number of blocks found during an allocation pass. The // increases the number of blocks found during an allocation pass. The
// lookahead buffer is stored as a compact bitmap, so each byte of RAM // lookahead buffer is stored as a compact bitmap, so each byte of RAM
// can track 8 blocks. Must be a multiple of 4. // can track 8 blocks. Must be a multiple of 8.
lfs_size_t lookahead_size; lfs_size_t lookahead_size;
// Optional statically allocated read buffer. Must be cache_size. // Optional statically allocated read buffer. Must be cache_size.
@@ -216,7 +216,7 @@ struct lfs_config {
void *prog_buffer; void *prog_buffer;
// Optional statically allocated lookahead buffer. Must be lookahead_size // Optional statically allocated lookahead buffer. Must be lookahead_size
// and aligned to a 64-bit boundary. By default lfs_malloc is used to // and aligned to a 32-bit boundary. By default lfs_malloc is used to
// allocate this buffer. // allocate this buffer.
void *lookahead_buffer; void *lookahead_buffer;