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Update Kconfig help comments

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Gregory Nutt 2016-02-23 06:38:51 -06:00
parent c620b321b1
commit 0682671ffe
2 changed files with 43 additions and 1 deletions
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2
arch

@ -1 +1 @@
Subproject commit 50415398b1ae76ffb66df9813f4647dcbfcee234
Subproject commit 6e6f7947bc11679ec220022b696b8d47badf45f7

42
fs/fat/Kconfig
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@ -83,6 +83,20 @@ config FAT_FORCE_INDIRECT
without CONFIG_FAT_DMAMEMORY if there is, for example, only a
memory aligment constraints.
FORCE_ DMA DIRECT EXAMPLE USAGE
INDIRECT MEMORY RETRY
Y Y * Use specially allocated memory;
Never use caller provided buffer
Y N * Not recommended
N Y ** Special memory required; user memory
has mixed capability; sometimes
caller memory is not usable
N N Y No special memory but there are
alignment requirements; return is
caller buffer is not properly aligned
N N N User memory can always be used for
transfer.
config FAT_DMAMEMORY
bool "DMA memory allocator"
default n
@ -101,6 +115,20 @@ config FAT_DMAMEMORY
corresponding function that will be called to free the DMA-capable
memory.
FORCE_ DMA DIRECT EXAMPLE USAGE
INDIRECT MEMORY RETRY
Y Y * Use specially allocated memory;
Never use caller provided buffer
Y N * Not recommended
N Y ** Special memory required; user memory
has mixed capability; sometimes
caller memory is not usable
N N Y No special memory but there are
alignment requirements; return is
caller buffer is not properly aligned
N N N User memory can always be used for
transfer.
config FAT_DIRECT_RETRY
bool "Direct transfer retry"
default y if FAT_DMAMEMORY
@ -129,4 +157,18 @@ config FAT_DIRECT_RETRY
transfer fails with -EFAULT. then the FAT file system will try one
more time using the internal sector buffers.
FORCE_ DMA DIRECT EXAMPLE USAGE
INDIRECT MEMORY RETRY
Y Y * Use specially allocated memory;
Never use caller provided buffer
Y N * Not recommended
N Y ** Special memory required; user memory
has mixed capability; sometimes
caller memory is not usable
N N Y No special memory but there are
alignment requirements; return is
caller buffer is not properly aligned
N N N User memory can always be used for
transfer.
endif # FAT