From: Alexey Dobriyan <adobriyan@gmail.com>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
axboe@kernel.dk, kvalo@codeaurora.org,
john.johansen@canonical.com, linux-arch@vger.kernel.org
Subject: [PATCH] unaligned: delete 1-byte accessors
Date: Mon, 22 Jul 2019 00:52:53 +0300 [thread overview]
Message-ID: <20190721215253.GA18177@avx2> (raw)
Each and every 1-byte access is aligned!
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
There may be more unaligned stuff in arch/.
block/partitions/ldm.h | 2 +-
block/partitions/msdos.c | 2 +-
drivers/net/wireless/marvell/mwifiex/pcie.c | 2 +-
include/linux/unaligned/generic.h | 12 ++----------
net/core/netpoll.c | 4 ++--
security/apparmor/policy_unpack.c | 2 +-
6 files changed, 8 insertions(+), 16 deletions(-)
--- a/block/partitions/ldm.h
+++ b/block/partitions/ldm.h
@@ -85,7 +85,7 @@ struct parsed_partitions;
#define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */
/* Borrowed from msdos.c */
-#define SYS_IND(p) (get_unaligned(&(p)->sys_ind))
+#define SYS_IND(p) ((p)->sys_ind)
struct frag { /* VBLK Fragment handling */
struct list_head list;
--- a/block/partitions/msdos.c
+++ b/block/partitions/msdos.c
@@ -33,7 +33,7 @@
*/
#include <asm/unaligned.h>
-#define SYS_IND(p) get_unaligned(&p->sys_ind)
+#define SYS_IND(p) ((p)->sys_ind)
static inline sector_t nr_sects(struct partition *p)
{
--- a/drivers/net/wireless/marvell/mwifiex/pcie.c
+++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
@@ -1090,7 +1090,7 @@ static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter)
mwifiex_dbg(adapter, INFO,
"alloc_scook: sleep cookie=0x%x\n",
- get_unaligned(card->sleep_cookie_vbase));
+ *card->sleep_cookie_vbase);
return 0;
}
--- a/include/linux/unaligned/generic.h
+++ b/include/linux/unaligned/generic.h
@@ -9,27 +9,22 @@
extern void __bad_unaligned_access_size(void);
#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
- __bad_unaligned_access_size())))); \
+ __bad_unaligned_access_size()))); \
}))
#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
- __bad_unaligned_access_size())))); \
+ __bad_unaligned_access_size()))); \
}))
#define __put_unaligned_le(val, ptr) ({ \
void *__gu_p = (ptr); \
switch (sizeof(*(ptr))) { \
- case 1: \
- *(u8 *)__gu_p = (__force u8)(val); \
- break; \
case 2: \
put_unaligned_le16((__force u16)(val), __gu_p); \
break; \
@@ -48,9 +43,6 @@ extern void __bad_unaligned_access_size(void);
#define __put_unaligned_be(val, ptr) ({ \
void *__gu_p = (ptr); \
switch (sizeof(*(ptr))) { \
- case 1: \
- *(u8 *)__gu_p = (__force u8)(val); \
- break; \
case 2: \
put_unaligned_be16((__force u16)(val), __gu_p); \
break; \
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -408,7 +408,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
ip6h = ipv6_hdr(skb);
/* ip6h->version = 6; ip6h->priority = 0; */
- put_unaligned(0x60, (unsigned char *)ip6h);
+ *(unsigned char *)ip6h = 0x60;
ip6h->flow_lbl[0] = 0;
ip6h->flow_lbl[1] = 0;
ip6h->flow_lbl[2] = 0;
@@ -436,7 +436,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
iph = ip_hdr(skb);
/* iph->version = 4; iph->ihl = 5; */
- put_unaligned(0x45, (unsigned char *)iph);
+ *(unsigned char *)iph = 0x45;
iph->tos = 0;
put_unaligned(htons(ip_len), &(iph->tot_len));
iph->id = htons(atomic_inc_return(&ip_ident));
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -301,7 +301,7 @@ static bool unpack_u8(struct aa_ext *e, u8 *data, const char *name)
if (!inbounds(e, sizeof(u8)))
goto fail;
if (data)
- *data = get_unaligned((u8 *)e->pos);
+ *data = *(u8 *)e->pos;
e->pos += sizeof(u8);
return 1;
}
next reply other threads:[~2019-07-21 21:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-21 21:52 Alexey Dobriyan [this message]
2019-07-21 23:08 ` [PATCH] unaligned: delete 1-byte accessors James Bottomley
2019-07-22 5:22 ` Alexey Dobriyan
2019-07-22 5:48 ` James Bottomley
2019-07-22 6:07 ` Alexey Dobriyan
2019-07-22 6:20 ` James Bottomley
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