From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: + mmap-locking-api-add-mmap_lock_initializer.patch added to -mm tree Date: Wed, 20 May 2020 20:24:43 -0700 Message-ID: <20200521032443.B8DQ6L4T8%akpm@linux-foundation.org> References: <20200513175005.1f4839360c18c0238df292d1@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from mail.kernel.org ([198.145.29.99]:60902 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728172AbgEUDYp (ORCPT ); Wed, 20 May 2020 23:24:45 -0400 In-Reply-To: <20200513175005.1f4839360c18c0238df292d1@linux-foundation.org> Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: daniel.m.jordan@oracle.com, dbueso@suse.de, hughd@google.com, jgg@ziepe.ca, jglisse@redhat.com, jhubbard@nvidia.com, ldufour@linux.ibm.com, Liam.Howlett@oracle.com, mm-commits@vger.kernel.org, peterz@infradead.org, rientjes@google.com, vbabka@suse.cz, walken@google.com, willy@infradead.org, yinghan@google.com The patch titled Subject: mmap locking API: add MMAP_LOCK_INITIALIZER has been added to the -mm tree. Its filename is mmap-locking-api-add-mmap_lock_initializer.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mmap-locking-api-add-mmap_lock_initializer.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mmap-locking-api-add-mmap_lock_initializer.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Michel Lespinasse Subject: mmap locking API: add MMAP_LOCK_INITIALIZER Define a new initializer for the mmap locking api. Initially this just evaluates to __RWSEM_INITIALIZER as the API is defined as wrappers around rwsem. Link: http://lkml.kernel.org/r/20200520052908.204642-9-walken@google.com Signed-off-by: Michel Lespinasse Reviewed-by: Laurent Dufour Reviewed-by: Vlastimil Babka Cc: Daniel Jordan Cc: Davidlohr Bueso Cc: David Rientjes Cc: Hugh Dickins Cc: Jason Gunthorpe Cc: Jerome Glisse Cc: John Hubbard Cc: Liam Howlett Cc: Matthew Wilcox Cc: Peter Zijlstra Cc: Ying Han Signed-off-by: Andrew Morton --- arch/x86/kernel/tboot.c | 2 +- drivers/firmware/efi/efi.c | 2 +- include/linux/mmap_lock.h | 3 +++ mm/init-mm.c | 2 +- 4 files changed, 6 insertions(+), 3 deletions(-) --- a/arch/x86/kernel/tboot.c~mmap-locking-api-add-mmap_lock_initializer +++ a/arch/x86/kernel/tboot.c @@ -93,7 +93,7 @@ static struct mm_struct tboot_mm = { .pgd = swapper_pg_dir, .mm_users = ATOMIC_INIT(2), .mm_count = ATOMIC_INIT(1), - .mmap_sem = __RWSEM_INITIALIZER(init_mm.mmap_sem), + MMAP_LOCK_INITIALIZER(init_mm) .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), .mmlist = LIST_HEAD_INIT(init_mm.mmlist), }; --- a/drivers/firmware/efi/efi.c~mmap-locking-api-add-mmap_lock_initializer +++ a/drivers/firmware/efi/efi.c @@ -54,7 +54,7 @@ struct mm_struct efi_mm = { .mm_rb = RB_ROOT, .mm_users = ATOMIC_INIT(2), .mm_count = ATOMIC_INIT(1), - .mmap_sem = __RWSEM_INITIALIZER(efi_mm.mmap_sem), + MMAP_LOCK_INITIALIZER(efi_mm) .page_table_lock = __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock), .mmlist = LIST_HEAD_INIT(efi_mm.mmlist), .cpu_bitmap = { [BITS_TO_LONGS(NR_CPUS)] = 0}, --- a/include/linux/mmap_lock.h~mmap-locking-api-add-mmap_lock_initializer +++ a/include/linux/mmap_lock.h @@ -1,6 +1,9 @@ #ifndef _LINUX_MMAP_LOCK_H #define _LINUX_MMAP_LOCK_H +#define MMAP_LOCK_INITIALIZER(name) \ + .mmap_sem = __RWSEM_INITIALIZER((name).mmap_sem), + static inline void mmap_init_lock(struct mm_struct *mm) { init_rwsem(&mm->mmap_sem); --- a/mm/init-mm.c~mmap-locking-api-add-mmap_lock_initializer +++ a/mm/init-mm.c @@ -31,7 +31,7 @@ struct mm_struct init_mm = { .pgd = swapper_pg_dir, .mm_users = ATOMIC_INIT(2), .mm_count = ATOMIC_INIT(1), - .mmap_sem = __RWSEM_INITIALIZER(init_mm.mmap_sem), + MMAP_LOCK_INITIALIZER(init_mm) .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), .arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock), .mmlist = LIST_HEAD_INIT(init_mm.mmlist), _ Patches currently in -mm which might be from walken@google.com are mmap-locking-api-initial-implementation-as-rwsem-wrappers.patch mmu-notifier-use-the-new-mmap-locking-api.patch dma-reservations-use-the-new-mmap-locking-api.patch mmap-locking-api-use-coccinelle-to-convert-mmap_sem-rwsem-call-sites.patch mmap-locking-api-convert-mmap_sem-call-sites-missed-by-coccinelle.patch mmap-locking-api-convert-nested-write-lock-sites.patch mmap-locking-api-add-mmap_read_trylock_non_owner.patch mmap-locking-api-add-mmap_lock_initializer.patch mmap-locking-api-add-mmap_assert_locked-and-mmap_assert_write_locked.patch mmap-locking-api-rename-mmap_sem-to-mmap_lock.patch mmap-locking-api-convert-mmap_sem-api-comments.patch mmap-locking-api-convert-mmap_sem-comments.patch