Merge branch 'dalcinl/fix-null' into 'master'

Fix 0 -> NULL for pointers

See merge request petsc/petsc!3086

Mat: Replace 0 -> NULL for pointers

Merge remote-tracking branch 'origin/maint'

Merge branch 'stefanozampini/fix-nasty-bug-from-gamg' into 'maint'

fix nasty bug from pcgamg

See merge request petsc/petsc!2850

Minor

Merge branch 'stefanozampini/feature-add-hpackages-rebased' into 'master'

Fixes to MatProduct + many bug fixes + new hierarchical matrix support

See merge request petsc/petsc!2800

MatHeaderMerge: skip if same object

MatBindToCPU: add checks

Merge remote-tracking branch 'origin/hzhng/matproduct-api'

This branch reorganizes the API of mat-mat operations: A*B, At*B, A*Bt, PtAP, RARt, A*B*C
- See matproduct.c for detailed description of new API
- removed API function XXXSymbolic() and XXXNumeric()

This branch reorganizes the API of mat-mat operations: A*B, At*B, A*Bt, PtAP, RARt, A*B*C
- See matproduct.c for detailed description of new API
- removed API function XXXSymbolic() and XXXNumeric()
- removed subroutines MatMatMult_xxx, MatPtAP_xxx, ...
- modified MatxxxSymbolic_XXX() prototype (product is an input now)
- selection of algorithm is in MatProductSetFromOptions_xxx()

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Merge branch 'rmills/ops-bindtocpu-not-ops-pintocpu' into 'master'

Rename "pintocpu" in VecOps and MatOps to "bindtocpu".

See merge request petsc/petsc!2589

Rename "pintocpu" in VecOps and MatOps to "bindtocpu".

This change should have been made in the commit that changed XXXPinToCPU()
to XXXBindToCPU(), but it was overlooked.

Merge remote-tracking branch 'origin/stefanozampini/fix-matshell-axpy'

Fix MATSHELL MatAXPY

See merge request petsc/petsc!2492

Merge branch 'rmills/bindtocpu-not-pintocpu' into 'master'

Changed XXXPinToCPU() to XXXBindToCPU() to prevent confusion.

See merge request petsc/petsc!2477

Changed XXXPinToCPU() to XXXBindToCPU() to prevent confusion.

The reason for this change is that we already use the terminology
"pinned" to refer to memory that is non-pageable, in the context of
Pe

Changed XXXPinToCPU() to XXXBindToCPU() to prevent confusion.

The reason for this change is that we already use the terminology
"pinned" to refer to memory that is non-pageable, in the context of
PetscSF as well as allocating host memory when GPUs are being employed.

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MatHeaderReplace: it is wrong to call the user defined destroy on C

The context has been already passed to A

doc fixes

Merge remote-tracking branch 'origin/jolivet/fix-error-col-row'

Multiple meaningless fixes (but misleading bugs)

See merge request petsc/petsc!2103

row <-> column

Merge branch 'stefanozampini/gpu-bddc' into 'master'

Improvements towards BDDC on GPUs

See merge request petsc/petsc!2067

{Vec|Mat}PinToCPU: cannot call return if PetscFunctionBegin has been called

minor

Merge branch 'rmills/doc-misc-small-fixes' into 'master'

Rmills/doc misc small fixes

See merge request petsc/petsc!2070

Removed empty "Notes" and unused "User manual sections" fields from MacCreate() manual page.

Merged in haplav/feature-matload-dense-hdf5 (pull request #1795)

MatLoad_Dense_HDF5

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>