# git rev-parse -q --verify 3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3^{commit}
3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3
already have revision, skipping fetch
# git checkout -q -f -B kisskb 3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3
# git clean -qxdf
# < git log -1
# commit 3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3
# Author: Kent Overstreet <kent.overstreet@gmail.com>
# Date:   Fri Dec 18 04:07:11 2020 -0500
# 
#     mm/filemap: fix infinite loop in generic_file_buffered_read()
#     
#     If iter->count is 0 and iocb->ki_pos is page aligned, this causes
#     nr_pages to be 0.
#     
#     Then in generic_file_buffered_read_get_pages() find_get_pages_contig()
#     returns 0 - because we asked for 0 pages, so we call
#     generic_file_buffered_read_no_cached_page() which attempts to add a page
#     to the page cache, which fails with -EEXIST, and then we loop. Oops...
#     
#     Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
#     Reported-by: Jens Axboe <axboe@kernel.dk>
#     Reviewed-by: Jens Axboe <axboe@kernel.dk>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-ld --version
# < git log --format=%s --max-count=1 3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3
# < make -s -j 24 ARCH=mips O=/kisskb/build/linus_mips-allmodconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# Added to kconfig CONFIG_MIPS_CPS_NS16550_BASE=0x1b0003f8
# Added to kconfig CONFIG_MIPS_CPS_NS16550_SHIFT=0
# < make -s -j 24 ARCH=mips O=/kisskb/build/linus_mips-allmodconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-  help
# make -s -j 24 ARCH=mips O=/kisskb/build/linus_mips-allmodconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-  olddefconfig
.config:12857:warning: override: reassigning to symbol MIPS_CPS_NS16550_SHIFT
# make -s -j 24 ARCH=mips O=/kisskb/build/linus_mips-allmodconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-  
/kisskb/src/lib/bitfield_kunit.c: In function 'test_bitfields_constants':
/kisskb/src/lib/bitfield_kunit.c:93:1: warning: the frame size of 4200 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/drivers/dma-buf/heaps/cma_heap.c: In function 'cma_heap_do_vmap':
/kisskb/src/drivers/dma-buf/heaps/cma_heap.c:195:10: error: implicit declaration of function 'vmap'; did you mean 'kmap'? [-Werror=implicit-function-declaration]
  vaddr = vmap(buffer->pages, buffer->pagecount, VM_MAP, PAGE_KERNEL);
          ^~~~
          kmap
/kisskb/src/drivers/dma-buf/heaps/cma_heap.c:195:49: error: 'VM_MAP' undeclared (first use in this function); did you mean 'VM_MTE'?
  vaddr = vmap(buffer->pages, buffer->pagecount, VM_MAP, PAGE_KERNEL);
                                                 ^~~~~~
                                                 VM_MTE
/kisskb/src/drivers/dma-buf/heaps/cma_heap.c:195:49: note: each undeclared identifier is reported only once for each function it appears in
/kisskb/src/drivers/dma-buf/heaps/cma_heap.c: In function 'cma_heap_vunmap':
/kisskb/src/drivers/dma-buf/heaps/cma_heap.c:235:3: error: implicit declaration of function 'vunmap'; did you mean 'kunmap'? [-Werror=implicit-function-declaration]
   vunmap(buffer->vaddr);
   ^~~~~~
   kunmap
cc1: some warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:279: drivers/dma-buf/heaps/cma_heap.o] Error 1
make[3]: *** [/kisskb/src/scripts/Makefile.build:496: drivers/dma-buf/heaps] Error 2
make[2]: *** [/kisskb/src/scripts/Makefile.build:496: drivers/dma-buf] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1805: drivers] Error 2
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 24 ARCH=mips O=/kisskb/build/linus_mips-allmodconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_mips-allmodconfig_mips-gcc8
# Build took: 0:13:49.086224