From: Yury Norov <ynorov@nvidia•com>
To: Andrew Morton <akpm@linux-foundation•org>,
"David S. Miller" <davem@davemloft•net>,
"Michael S. Tsirkin" <mst@redhat•com>,
"Theodore Ts'o" <tytso@mit•edu>,
Albert Ou <aou@eecs•berkeley.edu>,
Alexander Duyck <alexanderduyck@fb•com>,
Alexander Gordeev <agordeev@linux•ibm.com>,
Alexander Viro <viro@zeniv•linux.org.uk>,
Alexandra Winter <wintera@linux•ibm.com>,
Andreas Dilger <adilger.kernel@dilger•ca>,
Andrew Lunn <andrew+netdev@lunn•ch>,
Anna Schumaker <anna@kernel•org>,
Anton Yakovlev <anton.yakovlev@opensynergy•com>,
Arnaldo Carvalho de Melo <acme@kernel•org>,
Aswin Karuvally <aswin@linux•ibm.com>,
Borislav Petkov <bp@alien8•de>, Carlos Maiolino <cem@kernel•org>,
Catalin Marinas <catalin.marinas@arm•com>,
Chao Yu <chao@kernel•org>,
Christian Borntraeger <borntraeger@linux•ibm.com>,
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Claudio Imbrenda <imbrenda@linux•ibm.com>,
Dave Hansen <dave.hansen@linux•intel.com>,
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Ingo Molnar <mingo@redhat•com>, Jaegeuk Kim <jaegeuk@kernel•org>,
Jakub Kicinski <kuba@kernel•org>,
Jani Nikula <jani.nikula@linux•intel.com>,
Janosch Frank <frankja@linux•ibm.com>,
Jaroslav Kysela <perex@perex•cz>, Jens Axboe <axboe@kernel•dk>,
Joonas Lahtinen <joonas.lahtinen@linux•intel.com>,
Latchesar Ionkov <lucho@ionkov•net>,
Linus Walleij <linusw@kernel•org>,
Madhavan Srinivasan <maddy@linux•ibm.com>,
Mark Brown <broonie@kernel•org>,
Michael Ellerman <mpe@ellerman•id.au>,
Miklos Szeredi <miklos@szeredi•hu>,
Namhyung Kim <namhyung@kernel•org>,
Palmer Dabbelt <palmer@dabbelt•com>,
Paolo Abeni <pabeni@redhat•com>,
Paolo Bonzini <pbonzini@redhat•com>,
Paul Walmsley <pjw@kernel•org>,
Peter Zijlstra <peterz@infradead•org>,
Rodrigo Vivi <rodrigo.vivi@intel•com>,
Sean Christopherson <seanjc@google•com>,
Simona Vetter <simona@ffwll•ch>, Takashi Iwai <tiwai@suse•com>,
Thomas Gleixner <tglx@kernel•org>,
Trond Myklebust <trondmy@kernel•org>,
Tvrtko Ursulin <tursulin@ursulin•net>,
Vasily Gorbik <gor@linux•ibm.com>, Will Deacon <will@kernel•org>,
Yury Norov <yury.norov@gmail•com>, Zheng Gu <cengku@gmail•com>
Cc: Yury Norov <ynorov@nvidia•com>,
linux-kernel@vger•kernel.org, x86@kernel•org,
linux-arm-kernel@lists•infradead.org,
linuxppc-dev@lists•ozlabs.org, linux-riscv@lists•infradead.org,
kvm@vger•kernel.org, linux-s390@vger•kernel.org,
linux-block@vger•kernel.org, intel-gfx@lists•freedesktop.org,
dri-devel@lists•freedesktop.org, dm-devel@lists•linux.dev,
netdev@vger•kernel.org, linux-spi@vger•kernel.org,
linux-ext4@vger•kernel.org,
linux-f2fs-devel@lists•sourceforge.net,
linux-fsdevel@vger•kernel.org, linux-xfs@vger•kernel.org,
linux-nfs@vger•kernel.org, linux-crypto@vger•kernel.org,
linux-mm@kvack•org, linux-perf-users@vger•kernel.org,
v9fs@lists•linux.dev, virtualization@lists•linux.dev,
linux-sound@vger•kernel.org
Subject: [PATCH 1/8] mm: add rest_of_page() macro
Date: Tue, 3 Mar 2026 20:27:09 -0500 [thread overview]
Message-ID: <20260304012717.201797-2-ynorov@nvidia.com> (raw)
In-Reply-To: <20260304012717.201797-1-ynorov@nvidia.com>
The net/9p networking driver has a handy macro to calculate the
amount of bytes from a given pointer to the end of page. Move it
to mm. The following patches apply it tree-wide.
Signed-off-by: Yury Norov <ynorov@nvidia•com>
---
include/linux/mm.h | 2 ++
net/9p/trans_virtio.c | 6 ------
2 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5be3d8a8f806..6d1025c6249a 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2793,6 +2793,8 @@ extern void pagefault_out_of_memory(void);
#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK)
#define offset_in_folio(folio, p) ((unsigned long)(p) & (folio_size(folio) - 1))
+#define rest_of_page(p) (PAGE_SIZE - offset_in_page(p))
+
/*
* Parameter block passed down to zap_pte_range in exceptional cases.
*/
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 4cdab7094b27..1ca53209d036 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -87,12 +87,6 @@ struct virtio_chan {
static struct list_head virtio_chan_list;
-/* How many bytes left in this page. */
-static unsigned int rest_of_page(void *data)
-{
- return PAGE_SIZE - offset_in_page(data);
-}
-
/**
* p9_virtio_close - reclaim resources of a channel
* @client: client instance
--
2.43.0
next prev parent reply other threads:[~2026-03-04 1:27 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-04 1:27 [PATCH 0/8] mm: globalize rest_of_page() macro Yury Norov
2026-03-04 1:27 ` Yury Norov [this message]
2026-03-04 1:27 ` [PATCH 2/8] fs: use rest_of_page() macro where appropriate Yury Norov
2026-03-04 1:27 ` [PATCH 3/8] net: " Yury Norov
2026-03-04 1:27 ` [PATCH 4/8] core: " Yury Norov
2026-03-04 1:27 ` [PATCH 5/8] spi: " Yury Norov
2026-03-04 11:10 ` Mark Brown
2026-03-04 1:27 ` [PATCH 6/8] KVM: " Yury Norov
2026-03-04 1:27 ` [PATCH 7/8] drivers: ALSA: " Yury Norov
2026-03-04 1:27 ` [PATCH 8/8] arch: " Yury Norov
2026-04-02 21:58 ` Paul Walmsley
2026-03-04 2:28 ` [PATCH 0/8] mm: globalize rest_of_page() macro Jakub Kicinski
2026-03-04 2:42 ` Jens Axboe
2026-03-04 2:49 ` Sean Christopherson
2026-03-04 3:32 ` Yury Norov
2026-03-04 3:35 ` Jens Axboe
2026-03-04 12:48 ` Peter Zijlstra
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