Revision d58b0d980f0b1c27204da0e05537b606da45a07f authored by Linus Torvalds on 04 August 2016, 23:56:16 UTC, committed by Linus Torvalds on 04 August 2016, 23:56:16 UTC
Pull more btrfs updates from Chris Mason: "This is part two of my btrfs pull, which is some cleanups and a batch of fixes. Most of the code here is from Jeff Mahoney, making the pointers we pass around internally more consistent and less confusing overall. I noticed a small problem right before I sent this out yesterday, so I fixed it up and re-tested overnight" * 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (40 commits) Btrfs: fix __MAX_CSUM_ITEMS btrfs: btrfs_abort_transaction, drop root parameter btrfs: add btrfs_trans_handle->fs_info pointer btrfs: btrfs_relocate_chunk pass extent_root to btrfs_end_transaction btrfs: convert nodesize macros to static inlines btrfs: introduce BTRFS_MAX_ITEM_SIZE btrfs: cleanup, remove prototype for btrfs_find_root_ref btrfs: copy_to_sk drop unused root parameter btrfs: simpilify btrfs_subvol_inherit_props btrfs: tests, use BTRFS_FS_STATE_DUMMY_FS_INFO instead of dummy root btrfs: tests, require fs_info for root btrfs: tests, move initialization into tests/ btrfs: btrfs_test_opt and friends should take a btrfs_fs_info btrfs: prefix fsid to all trace events btrfs: plumb fs_info into btrfs_work btrfs: remove obsolete part of comment in statfs btrfs: hide test-only member under ifdef btrfs: Ratelimit "no csum found" info message btrfs: Add ratelimit to btrfs printing Btrfs: fix unexpected balance crash due to BUG_ON ...
iomap_copy.c
/*
* Copyright 2006 PathScale, Inc. All Rights Reserved.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/export.h>
#include <linux/io.h>
/**
* __iowrite32_copy - copy data to MMIO space, in 32-bit units
* @to: destination, in MMIO space (must be 32-bit aligned)
* @from: source (must be 32-bit aligned)
* @count: number of 32-bit quantities to copy
*
* Copy data from kernel space to MMIO space, in units of 32 bits at a
* time. Order of access is not guaranteed, nor is a memory barrier
* performed afterwards.
*/
void __attribute__((weak)) __iowrite32_copy(void __iomem *to,
const void *from,
size_t count)
{
u32 __iomem *dst = to;
const u32 *src = from;
const u32 *end = src + count;
while (src < end)
__raw_writel(*src++, dst++);
}
EXPORT_SYMBOL_GPL(__iowrite32_copy);
/**
* __ioread32_copy - copy data from MMIO space, in 32-bit units
* @to: destination (must be 32-bit aligned)
* @from: source, in MMIO space (must be 32-bit aligned)
* @count: number of 32-bit quantities to copy
*
* Copy data from MMIO space to kernel space, in units of 32 bits at a
* time. Order of access is not guaranteed, nor is a memory barrier
* performed afterwards.
*/
void __ioread32_copy(void *to, const void __iomem *from, size_t count)
{
u32 *dst = to;
const u32 __iomem *src = from;
const u32 __iomem *end = src + count;
while (src < end)
*dst++ = __raw_readl(src++);
}
EXPORT_SYMBOL_GPL(__ioread32_copy);
/**
* __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
* @to: destination, in MMIO space (must be 64-bit aligned)
* @from: source (must be 64-bit aligned)
* @count: number of 64-bit quantities to copy
*
* Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
* time. Order of access is not guaranteed, nor is a memory barrier
* performed afterwards.
*/
void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
const void *from,
size_t count)
{
#ifdef CONFIG_64BIT
u64 __iomem *dst = to;
const u64 *src = from;
const u64 *end = src + count;
while (src < end)
__raw_writeq(*src++, dst++);
#else
__iowrite32_copy(to, from, count * 2);
#endif
}
EXPORT_SYMBOL_GPL(__iowrite64_copy);
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