/* * Copyright (C) 2007 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 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., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #include #include #include "ctree.h" static inline u8 get_unaligned_le8(const void *p) { return *(u8 *)p; } static inline void put_unaligned_le8(u8 val, void *p) { *(u8 *)p = val; } /* * this is some deeply nasty code. * * The end result is that anyone who #includes ctree.h gets a * declaration for the btrfs_set_foo functions and btrfs_foo functions, * which are wrappers of btrfs_set_token_#bits functions and * btrfs_get_token_#bits functions, which are defined in this file. * * These setget functions do all the extent_buffer related mapping * required to efficiently read and write specific fields in the extent * buffers. Every pointer to metadata items in btrfs is really just * an unsigned long offset into the extent buffer which has been * cast to a specific type. This gives us all the gcc type checking. * * The extent buffer api is used to do the page spanning work required to * have a metadata blocksize different from the page size. */ #define DEFINE_BTRFS_SETGET_BITS(bits) \ u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ unsigned long off, \ struct btrfs_map_token *token) \ { \ unsigned long part_offset = (unsigned long)ptr; \ unsigned long offset = part_offset + off; \ void *p; \ int err; \ char *kaddr; \ unsigned long map_start; \ unsigned long map_len; \ int size = sizeof(u##bits); \ u##bits res; \ \ if (token && token->kaddr && token->offset <= offset && \ token->eb == eb && \ (token->offset + PAGE_SIZE >= offset + size)) { \ kaddr = token->kaddr; \ p = kaddr + part_offset - token->offset; \ res = get_unaligned_le##bits(p + off); \ return res; \ } \ err = map_private_extent_buffer(eb, offset, size, \ &kaddr, &map_start, &map_len); \ if (err) { \ __le##bits leres; \ \ read_extent_buffer(eb, &leres, offset, size); \ return le##bits##_to_cpu(leres); \ } \ p = kaddr + part_offset - map_start; \ res = get_unaligned_le##bits(p + off); \ if (token) { \ token->kaddr = kaddr; \ token->offset = map_start; \ token->eb = eb; \ } \ return res; \ } \ void btrfs_set_token_##bits(struct extent_buffer *eb, \ void *ptr, unsigned long off, u##bits val, \ struct btrfs_map_token *token) \ { \ unsigned long part_offset = (unsigned long)ptr; \ unsigned long offset = part_offset + off; \ void *p; \ int err; \ char *kaddr; \ unsigned long map_start; \ unsigned long map_len; \ int size = sizeof(u##bits); \ \ if (token && token->kaddr && token->offset <= offset && \ token->eb == eb && \ (token->offset + PAGE_SIZE >= offset + size)) { \ kaddr = token->kaddr; \ p = kaddr + part_offset - token->offset; \ put_unaligned_le##bits(val, p + off); \ return; \ } \ err = map_private_extent_buffer(eb, offset, size, \ &kaddr, &map_start, &map_len); \ if (err) { \ __le##bits val2; \ \ val2 = cpu_to_le##bits(val); \ write_extent_buffer(eb, &val2, offset, size); \ return; \ } \ p = kaddr + part_offset - map_start; \ put_unaligned_le##bits(val, p + off); \ if (token) { \ token->kaddr = kaddr; \ token->offset = map_start; \ token->eb = eb; \ } \ } DEFINE_BTRFS_SETGET_BITS(8) DEFINE_BTRFS_SETGET_BITS(16) DEFINE_BTRFS_SETGET_BITS(32) DEFINE_BTRFS_SETGET_BITS(64) void btrfs_node_key(struct extent_buffer *eb, struct btrfs_disk_key *disk_key, int nr) { unsigned long ptr = btrfs_node_key_ptr_offset(nr); read_eb_member(eb, (struct btrfs_key_ptr *)ptr, struct btrfs_key_ptr, key, disk_key); } ted'>unified
authorStanislaw Gruszka <sgruszka@redhat.com>2017-01-29 12:40:52 +0100
committerKalle Valo <kvalo@codeaurora.org>2017-01-31 09:08:52 +0200
commit33e962c8871f015f5c8978384553dddcf5b81b22 (patch)
tree43aff96c2ee21d9e0fa2018457778a4de52053cd /include/dt-bindings/reset/qcom,mmcc-apq8084.h
parent575ddce0507789bf9830d089557d2199d2f91865 (diff)
rt2x00: fix clk_get call
clk_get() takes two arguments and might return ERR_PTR(), so we have to nullify pointer on that case, to do not break further call to clk_get_rate(). Reported-by: Felix Fietkau <nbd@nbd.name> Fixes: 34db70b92fae ("rt2x00: add copy of clk for soc devices") Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'include/dt-bindings/reset/qcom,mmcc-apq8084.h')