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  1. 06 Nov, 2018 1 commit
  3. 31 Oct, 2018 15 commits
  5. 26 Oct, 2018 1 commit
  7. 23 Oct, 2018 4 commits
    • David Howells's avatar
      iov_iter: Add I/O discard iterator · 9ea9ce04
      David Howells authored 
      
Add a new iterator, ITER_DISCARD, that can only be used in READ mode and
just discards any data copied to it.

This is useful in a network filesystem for discarding any unwanted data
sent by a server.
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      9ea9ce04
    • David Howells's avatar
      iov_iter: Separate type from direction and use accessor functions · aa563d7b
      David Howells authored 
      
In the iov_iter struct, separate the iterator type from the iterator
direction and use accessor functions to access them in most places.

Convert a bunch of places to use switch-statements to access them rather
then chains of bitwise-AND statements.  This makes it easier to add further
iterator types.  Also, this can be more efficient as to implement a switch
of small contiguous integers, the compiler can use ~50% fewer compare
instructions than it has to use bitwise-and instructions.

Further, cease passing the iterator type into the iterator setup function.
The iterator function can set that itself.  Only the direction is required.
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      aa563d7b
    • David Howells's avatar
      iov_iter: Use accessor function · 00e23707
      David Howells authored 
      
Use accessor functions to access an iterator's type and direction.  This
allows for the possibility of using some other method of determining the
type of iterator than if-chains with bitwise-AND conditions.
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      00e23707
    • Zong Li's avatar
      lib: Add umoddi3 and udivmoddi4 of GCC library routines · 6315730e
      Zong Li authored 
      
Add umoddi3 and udivmoddi4 support for 32-bit.

The RV32 need the umoddi3 to do modulo when the operands are long long
type, like other libraries implementation such as ucmpdi2, lshrdi3 and
so on.

I encounter the undefined reference 'umoddi3' when I use the in
house dma driver, although it is in house driver, but I think that
umoddi3 is a common function for RV32.

The udivmoddi4 and umoddi3 are copies from libgcc in gcc. There are other
functions use the udivmoddi4 in libgcc, so I separate the umoddi3 and
udivmoddi4 for flexible extension in the future.
Signed-off-by: default avatarZong Li <zong@andestech.com>
Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
      6315730e
  9. 21 Oct, 2018 19 commits

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