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io_uring: fix missing kmap() declaration on powerpc

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commit aa4c3967756c6c576a38a23ac511be211462a6b7 upstream.

Christophe reports that current master fails building on powerpc with
this error:

   CC      fs/io_uring.o
fs/io_uring.c: In function ‘loop_rw_iter’:
fs/io_uring.c:1628:21: error: implicit declaration of function ‘kmap’
[-Werror=implicit-function-declaration]
     iovec.iov_base = kmap(iter->bvec->bv_page)
                      ^
fs/io_uring.c:1628:19: warning: assignment makes pointer from integer
without a cast [-Wint-conversion]
     iovec.iov_base = kmap(iter->bvec->bv_page)
                    ^
fs/io_uring.c:1643:4: error: implicit declaration of function ‘kunmap’
[-Werror=implicit-function-declaration]
     kunmap(iter->bvec->bv_page);
     ^

which is caused by a missing highmem.h include. Fix it by including
it.

Fixes: 311ae9e159d8 ("io_uring: fix dead-hung for non-iter fixed rw")
Reported-by: Christophe Leroy <christophe.leroy@c-s.fr>
Tested-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Axboe 2019-11-29 10:14:00 -07:00 • committed by Greg Kroah-Hartman
commit 1dec7fcac3
1 changed files with 1 additions and 0 deletions
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fs/io_uring.c
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@ -70,6 +70,7 @@
#include <linux/nospec.h>
#include <linux/sizes.h>
#include <linux/hugetlb.h>
#include <linux/highmem.h>
#include <uapi/linux/io_uring.h>