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[PATCH] Use sg_set_buf/sg_init_one where applicable

Browse source 
This patch uses sg_set_buf/sg_init_one in some places where it was
duplicated.

Signed-off-by: David Hardeman <david@2gen.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Greg KH <greg@kroah.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
David Hardeman 2005-09-17 17:55:31 +10:00 committed by Herbert Xu
parent d32311fed7
commit 378f058cc4
10 changed files with 44 additions and 105 deletions
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19
crypto/hmac.c
View file

@ -18,18 +18,15 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/highmem.h> #include <linux/highmem.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <asm/scatterlist.h> #include <linux/scatterlist.h>
#include "internal.h" #include "internal.h"
static void hash_key(struct crypto_tfm *tfm, u8 *key, unsigned int keylen) static void hash_key(struct crypto_tfm *tfm, u8 *key, unsigned int keylen)
{ {
struct scatterlist tmp; struct scatterlist tmp;
tmp.page = virt_to_page(key); sg_set_buf(&tmp, key, keylen);
tmp.offset = offset_in_page(key);
tmp.length = keylen;
crypto_digest_digest(tfm, &tmp, 1, key); crypto_digest_digest(tfm, &tmp, 1, key);
} }
int crypto_alloc_hmac_block(struct crypto_tfm *tfm) int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
@ -69,9 +66,7 @@ void crypto_hmac_init(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen)
for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++) for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++)
ipad[i] ^= 0x36; ipad[i] ^= 0x36;
tmp.page = virt_to_page(ipad); sg_set_buf(&tmp, ipad, crypto_tfm_alg_blocksize(tfm));
tmp.offset = offset_in_page(ipad);
tmp.length = crypto_tfm_alg_blocksize(tfm);
crypto_digest_init(tfm); crypto_digest_init(tfm);
crypto_digest_update(tfm, &tmp, 1); crypto_digest_update(tfm, &tmp, 1);
@ -103,16 +98,12 @@ void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key,
for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++) for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++)
opad[i] ^= 0x5c; opad[i] ^= 0x5c;
tmp.page = virt_to_page(opad); sg_set_buf(&tmp, opad, crypto_tfm_alg_blocksize(tfm));
tmp.offset = offset_in_page(opad);
tmp.length = crypto_tfm_alg_blocksize(tfm);
crypto_digest_init(tfm); crypto_digest_init(tfm);
crypto_digest_update(tfm, &tmp, 1); crypto_digest_update(tfm, &tmp, 1);
tmp.page = virt_to_page(out); sg_set_buf(&tmp, out, crypto_tfm_alg_digestsize(tfm));
tmp.offset = offset_in_page(out);
tmp.length = crypto_tfm_alg_digestsize(tfm);
crypto_digest_update(tfm, &tmp, 1); crypto_digest_update(tfm, &tmp, 1);
crypto_digest_final(tfm, out); crypto_digest_final(tfm, out);

52
crypto/tcrypt.c
View file

@ -21,7 +21,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <asm/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/crypto.h> #include <linux/crypto.h>
#include <linux/highmem.h> #include <linux/highmem.h>
@ -86,7 +86,6 @@ static void hexdump(unsigned char *buf, unsigned int len)
static void test_hash(char *algo, struct hash_testvec *template, static void test_hash(char *algo, struct hash_testvec *template,
unsigned int tcount) unsigned int tcount)
{ {
char *p;
unsigned int i, j, k, temp; unsigned int i, j, k, temp;
struct scatterlist sg[8]; struct scatterlist sg[8];
char result[64]; char result[64];
@ -116,10 +115,7 @@ static void test_hash(char *algo, struct hash_testvec *template,
printk("test %u:\n", i + 1); printk("test %u:\n", i + 1);
memset(result, 0, 64); memset(result, 0, 64);
p = hash_tv[i].plaintext; sg_set_buf(&sg[0], hash_tv[i].plaintext, hash_tv[i].psize);
sg[0].page = virt_to_page(p);
sg[0].offset = offset_in_page(p);
sg[0].length = hash_tv[i].psize;
crypto_digest_init(tfm); crypto_digest_init(tfm);
if (tfm->crt_u.digest.dit_setkey) { if (tfm->crt_u.digest.dit_setkey) {
@ -154,10 +150,8 @@ static void test_hash(char *algo, struct hash_testvec *template,
hash_tv[i].plaintext + temp, hash_tv[i].plaintext + temp,
hash_tv[i].tap[k]); hash_tv[i].tap[k]);
temp += hash_tv[i].tap[k]; temp += hash_tv[i].tap[k];
p = &xbuf[IDX[k]]; sg_set_buf(&sg[k], &xbuf[IDX[k]],
sg[k].page = virt_to_page(p); hash_tv[i].tap[k]);
sg[k].offset = offset_in_page(p);
sg[k].length = hash_tv[i].tap[k];
} }
crypto_digest_digest(tfm, sg, hash_tv[i].np, result); crypto_digest_digest(tfm, sg, hash_tv[i].np, result);
@ -179,7 +173,6 @@ static void test_hash(char *algo, struct hash_testvec *template,
static void test_hmac(char *algo, struct hmac_testvec *template, static void test_hmac(char *algo, struct hmac_testvec *template,
unsigned int tcount) unsigned int tcount)
{ {
char *p;
unsigned int i, j, k, temp; unsigned int i, j, k, temp;
struct scatterlist sg[8]; struct scatterlist sg[8];
char result[64]; char result[64];
@ -210,11 +203,8 @@ static void test_hmac(char *algo, struct hmac_testvec *template,
printk("test %u:\n", i + 1); printk("test %u:\n", i + 1);
memset(result, 0, sizeof (result)); memset(result, 0, sizeof (result));
p = hmac_tv[i].plaintext;
klen = hmac_tv[i].ksize; klen = hmac_tv[i].ksize;
sg[0].page = virt_to_page(p); sg_set_buf(&sg[0], hmac_tv[i].plaintext, hmac_tv[i].psize);
sg[0].offset = offset_in_page(p);
sg[0].length = hmac_tv[i].psize;
crypto_hmac(tfm, hmac_tv[i].key, &klen, sg, 1, result); crypto_hmac(tfm, hmac_tv[i].key, &klen, sg, 1, result);
@ -243,10 +233,8 @@ static void test_hmac(char *algo, struct hmac_testvec *template,
hmac_tv[i].plaintext + temp, hmac_tv[i].plaintext + temp,
hmac_tv[i].tap[k]); hmac_tv[i].tap[k]);
temp += hmac_tv[i].tap[k]; temp += hmac_tv[i].tap[k];
p = &xbuf[IDX[k]]; sg_set_buf(&sg[k], &xbuf[IDX[k]],
sg[k].page = virt_to_page(p); hmac_tv[i].tap[k]);
sg[k].offset = offset_in_page(p);
sg[k].length = hmac_tv[i].tap[k];
} }
crypto_hmac(tfm, hmac_tv[i].key, &klen, sg, crypto_hmac(tfm, hmac_tv[i].key, &klen, sg,
@ -270,7 +258,7 @@ static void test_cipher(char *algo, int mode, int enc,
{ {
unsigned int ret, i, j, k, temp; unsigned int ret, i, j, k, temp;
unsigned int tsize; unsigned int tsize;
char *p, *q; char *q;
struct crypto_tfm *tfm; struct crypto_tfm *tfm;
char *key; char *key;
struct cipher_testvec *cipher_tv; struct cipher_testvec *cipher_tv;
@ -330,10 +318,8 @@ static void test_cipher(char *algo, int mode, int enc,
goto out; goto out;
} }
p = cipher_tv[i].input; sg_set_buf(&sg[0], cipher_tv[i].input,
sg[0].page = virt_to_page(p); cipher_tv[i].ilen);
sg[0].offset = offset_in_page(p);
sg[0].length = cipher_tv[i].ilen;
if (!mode) { if (!mode) {
crypto_cipher_set_iv(tfm, cipher_tv[i].iv, crypto_cipher_set_iv(tfm, cipher_tv[i].iv,
@ -389,10 +375,8 @@ static void test_cipher(char *algo, int mode, int enc,
cipher_tv[i].input + temp, cipher_tv[i].input + temp,
cipher_tv[i].tap[k]); cipher_tv[i].tap[k]);
temp += cipher_tv[i].tap[k]; temp += cipher_tv[i].tap[k];
p = &xbuf[IDX[k]]; sg_set_buf(&sg[k], &xbuf[IDX[k]],
sg[k].page = virt_to_page(p); cipher_tv[i].tap[k]);
sg[k].offset = offset_in_page(p);
sg[k].length = cipher_tv[i].tap[k];
} }
if (!mode) { if (!mode) {
@ -436,9 +420,7 @@ static int test_cipher_jiffies(struct crypto_tfm *tfm, int enc, char *p,
int bcount; int bcount;
int ret; int ret;
sg[0].page = virt_to_page(p); sg_set_buf(&sg[0], p, blen);
sg[0].offset = offset_in_page(p);
sg[0].length = blen;
for (start = jiffies, end = start + sec * HZ, bcount = 0; for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) { time_before(jiffies, end); bcount++) {
@ -464,9 +446,7 @@ static int test_cipher_cycles(struct crypto_tfm *tfm, int enc, char *p,
int ret = 0; int ret = 0;
int i; int i;
sg[0].page = virt_to_page(p); sg_set_buf(&sg[0], p, blen);
sg[0].offset = offset_in_page(p);
sg[0].length = blen;
local_bh_disable(); local_bh_disable();
local_irq_disable(); local_irq_disable();
@ -709,9 +689,7 @@ static void test_crc32c(void)
for (i = 0; i < NUMVEC; i++) { for (i = 0; i < NUMVEC; i++) {
for (j = 0; j < VECSIZE; j++) for (j = 0; j < VECSIZE; j++)
test_vec[i][j] = ++b; test_vec[i][j] = ++b;
sg[i].page = virt_to_page(test_vec[i]); sg_set_buf(&sg[i], test_vec[i], VECSIZE);
sg[i].offset = offset_in_page(test_vec[i]);
sg[i].length = VECSIZE;
} }
seed = SEEDTESTVAL; seed = SEEDTESTVAL;

12
drivers/md/dm-crypt.c
View file

@ -15,7 +15,7 @@
#include <linux/crypto.h> #include <linux/crypto.h>
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <asm/atomic.h> #include <asm/atomic.h>
#include <asm/scatterlist.h> #include <linux/scatterlist.h>
#include <asm/page.h> #include <asm/page.h>
#include "dm.h" #include "dm.h"
@ -164,9 +164,7 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
return -ENOMEM; return -ENOMEM;
} }
sg.page = virt_to_page(cc->key); sg_set_buf(&sg, cc->key, cc->key_size);
sg.offset = offset_in_page(cc->key);
sg.length = cc->key_size;
crypto_digest_digest(hash_tfm, &sg, 1, salt); crypto_digest_digest(hash_tfm, &sg, 1, salt);
crypto_free_tfm(hash_tfm); crypto_free_tfm(hash_tfm);
@ -207,14 +205,12 @@ static void crypt_iv_essiv_dtr(struct crypt_config *cc)
static int crypt_iv_essiv_gen(struct crypt_config *cc, u8 *iv, sector_t sector) static int crypt_iv_essiv_gen(struct crypt_config *cc, u8 *iv, sector_t sector)
{ {
struct scatterlist sg = { NULL, }; struct scatterlist sg;
memset(iv, 0, cc->iv_size); memset(iv, 0, cc->iv_size);
*(u64 *)iv = cpu_to_le64(sector); *(u64 *)iv = cpu_to_le64(sector);
sg.page = virt_to_page(iv); sg_set_buf(&sg, iv, cc->iv_size);
sg.offset = offset_in_page(iv);
sg.length = cc->iv_size;
crypto_cipher_encrypt((struct crypto_tfm *)cc->iv_gen_private, crypto_cipher_encrypt((struct crypto_tfm *)cc->iv_gen_private,
&sg, &sg, cc->iv_size); &sg, &sg, cc->iv_size);

5
drivers/net/wireless/airo.c
View file

@ -35,6 +35,7 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/in.h> #include <linux/in.h>
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/scatterlist.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/system.h> #include <asm/system.h>
@ -1590,9 +1591,7 @@ static void emmh32_setseed(emmh32_context *context, u8 *pkey, int keylen, struct
aes_counter[12] = (u8)(counter >> 24); aes_counter[12] = (u8)(counter >> 24);
counter++; counter++;
memcpy (plain, aes_counter, 16); memcpy (plain, aes_counter, 16);
sg[0].page = virt_to_page(plain); sg_set_buf(&sg[0], plain, 16);
sg[0].offset = ((long) plain & ~PAGE_MASK);
sg[0].length = 16;
crypto_cipher_encrypt(tfm, sg, sg, 16); crypto_cipher_encrypt(tfm, sg, sg, 16);
cipher = kmap(sg[0].page) + sg[0].offset; cipher = kmap(sg[0].page) + sg[0].offset;
for (j=0; (j<16) && (i< (sizeof(context->coeff)/sizeof(context->coeff[0]))); ) { for (j=0; (j<16) && (i< (sizeof(context->coeff)/sizeof(context->coeff[0]))); ) {

6
drivers/scsi/arm/scsi.h
View file

@ -10,6 +10,8 @@
* Commonly used scsi driver functions. * Commonly used scsi driver functions.
*/ */
#include <linux/scatterlist.h>
#define BELT_AND_BRACES #define BELT_AND_BRACES
/* /*
@ -22,9 +24,7 @@ static inline int copy_SCp_to_sg(struct scatterlist *sg, Scsi_Pointer *SCp, int
BUG_ON(bufs + 1 > max); BUG_ON(bufs + 1 > max);
sg->page = virt_to_page(SCp->ptr); sg_set_buf(sg, SCp->ptr, SCp->this_residual);
sg->offset = offset_in_page(SCp->ptr);
sg->length = SCp->this_residual;
if (bufs) if (bufs)
memcpy(sg + 1, SCp->buffer + 1, memcpy(sg + 1, SCp->buffer + 1,

10
drivers/scsi/libata-core.c
View file

@ -49,6 +49,7 @@
#include <linux/suspend.h> #include <linux/suspend.h>
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <linux/jiffies.h> #include <linux/jiffies.h>
#include <linux/scatterlist.h>
#include <scsi/scsi.h> #include <scsi/scsi.h>
#include "scsi.h" #include "scsi.h"
#include "scsi_priv.h" #include "scsi_priv.h"
@ -2576,19 +2577,12 @@ void ata_qc_prep(struct ata_queued_cmd *qc)
void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
{ {
struct scatterlist *sg;
qc->flags |= ATA_QCFLAG_SINGLE; qc->flags |= ATA_QCFLAG_SINGLE;
memset(&qc->sgent, 0, sizeof(qc->sgent));
qc->sg = &qc->sgent; qc->sg = &qc->sgent;
qc->n_elem = 1; qc->n_elem = 1;
qc->buf_virt = buf; qc->buf_virt = buf;
sg_init_one(qc->sg, buf, buflen);
sg = qc->sg;
sg->page = virt_to_page(buf);
sg->offset = (unsigned long) buf & ~PAGE_MASK;
sg->length = buflen;
} }
/** /**

5
drivers/scsi/sg.c
View file

@ -49,6 +49,7 @@ static int sg_version_num = 30533; /* 2 digits for each component */
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/blkdev.h> #include <linux/blkdev.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/scatterlist.h>
#include "scsi.h" #include "scsi.h"
#include <scsi/scsi_dbg.h> #include <scsi/scsi_dbg.h>
@ -1992,9 +1993,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
if (!p) if (!p)
break; break;
} }
sclp->page = virt_to_page(p); sg_set_buf(sclp, p, ret_sz);
sclp->offset = offset_in_page(p);
sclp->length = ret_sz;
SCSI_LOG_TIMEOUT(5, printk("sg_build_build: k=%d, a=0x%p, len=%d\n", SCSI_LOG_TIMEOUT(5, printk("sg_build_build: k=%d, a=0x%p, len=%d\n",
k, sg_scatg2virt(sclp), ret_sz)); k, sg_scatg2virt(sclp), ret_sz));

7
drivers/usb/misc/usbtest.c
View file

@ -9,7 +9,7 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/moduleparam.h> #include <linux/moduleparam.h>
#include <asm/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/usb.h> #include <linux/usb.h>
@ -381,7 +381,6 @@ alloc_sglist (int nents, int max, int vary)
sg = kmalloc (nents * sizeof *sg, SLAB_KERNEL); sg = kmalloc (nents * sizeof *sg, SLAB_KERNEL);
if (!sg) if (!sg)
return NULL; return NULL;
memset (sg, 0, nents * sizeof *sg);
for (i = 0; i < nents; i++) { for (i = 0; i < nents; i++) {
char *buf; char *buf;
@ -394,9 +393,7 @@ alloc_sglist (int nents, int max, int vary)
memset (buf, 0, size); memset (buf, 0, size);
/* kmalloc pages are always physically contiguous! */ /* kmalloc pages are always physically contiguous! */
sg [i].page = virt_to_page (buf); sg_init_one(&sg[i], buf, size);
sg [i].offset = offset_in_page (buf);
sg [i].length = size;
if (vary) { if (vary) {
size += vary; size += vary;

10
net/ipv6/addrconf.c
View file

@ -75,7 +75,7 @@
#ifdef CONFIG_IPV6_PRIVACY #ifdef CONFIG_IPV6_PRIVACY
#include <linux/random.h> #include <linux/random.h>
#include <linux/crypto.h> #include <linux/crypto.h>
#include <asm/scatterlist.h> #include <linux/scatterlist.h>
#endif #endif
#include <asm/uaccess.h> #include <asm/uaccess.h>
@ -1217,12 +1217,8 @@ static int __ipv6_regen_rndid(struct inet6_dev *idev)
struct net_device *dev; struct net_device *dev;
struct scatterlist sg[2]; struct scatterlist sg[2];
sg[0].page = virt_to_page(idev->entropy); sg_set_buf(&sg[0], idev->entropy, 8);
sg[0].offset = offset_in_page(idev->entropy); sg_set_buf(&sg[1], idev->work_eui64, 8);
sg[0].length = 8;
sg[1].page = virt_to_page(idev->work_eui64);
sg[1].offset = offset_in_page(idev->work_eui64);
sg[1].length = 8;
dev = idev->dev; dev = idev->dev;

23
net/sunrpc/auth_gss/gss_krb5_crypto.c
View file

@ -37,7 +37,7 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <asm/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/crypto.h> #include <linux/crypto.h>
#include <linux/highmem.h> #include <linux/highmem.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
@ -75,9 +75,7 @@ krb5_encrypt(
memcpy(local_iv, iv, crypto_tfm_alg_ivsize(tfm)); memcpy(local_iv, iv, crypto_tfm_alg_ivsize(tfm));
memcpy(out, in, length); memcpy(out, in, length);
sg[0].page = virt_to_page(out); sg_set_buf(&sg[0], out, length);
sg[0].offset = offset_in_page(out);
sg[0].length = length;
ret = crypto_cipher_encrypt_iv(tfm, sg, sg, length, local_iv); ret = crypto_cipher_encrypt_iv(tfm, sg, sg, length, local_iv);
@ -117,9 +115,7 @@ krb5_decrypt(
memcpy(local_iv,iv, crypto_tfm_alg_ivsize(tfm)); memcpy(local_iv,iv, crypto_tfm_alg_ivsize(tfm));
memcpy(out, in, length); memcpy(out, in, length);
sg[0].page = virt_to_page(out); sg_set_buf(&sg[0], out, length);
sg[0].offset = offset_in_page(out);
sg[0].length = length;
ret = crypto_cipher_decrypt_iv(tfm, sg, sg, length, local_iv); ret = crypto_cipher_decrypt_iv(tfm, sg, sg, length, local_iv);
@ -132,13 +128,6 @@ out:
EXPORT_SYMBOL(krb5_decrypt); EXPORT_SYMBOL(krb5_decrypt);
static void
buf_to_sg(struct scatterlist *sg, char *ptr, int len) {
sg->page = virt_to_page(ptr);
sg->offset = offset_in_page(ptr);
sg->length = len;
}
static int static int
process_xdr_buf(struct xdr_buf *buf, int offset, int len, process_xdr_buf(struct xdr_buf *buf, int offset, int len,
int (*actor)(struct scatterlist *, void *), void *data) int (*actor)(struct scatterlist *, void *), void *data)
@ -152,7 +141,7 @@ process_xdr_buf(struct xdr_buf *buf, int offset, int len,
thislen = buf->head[0].iov_len - offset; thislen = buf->head[0].iov_len - offset;
if (thislen > len) if (thislen > len)
thislen = len; thislen = len;
buf_to_sg(sg, buf->head[0].iov_base + offset, thislen); sg_set_buf(sg, buf->head[0].iov_base + offset, thislen);
ret = actor(sg, data); ret = actor(sg, data);
if (ret) if (ret)
goto out; goto out;
@ -195,7 +184,7 @@ process_xdr_buf(struct xdr_buf *buf, int offset, int len,
thislen = buf->tail[0].iov_len - offset; thislen = buf->tail[0].iov_len - offset;
if (thislen > len) if (thislen > len)
thislen = len; thislen = len;
buf_to_sg(sg, buf->tail[0].iov_base + offset, thislen); sg_set_buf(sg, buf->tail[0].iov_base + offset, thislen);
ret = actor(sg, data); ret = actor(sg, data);
len -= thislen; len -= thislen;
} }
@ -241,7 +230,7 @@ make_checksum(s32 cksumtype, char *header, int hdrlen, struct xdr_buf *body,
goto out; goto out;
crypto_digest_init(tfm); crypto_digest_init(tfm);
buf_to_sg(sg, header, hdrlen); sg_set_buf(sg, header, hdrlen);
crypto_digest_update(tfm, sg, 1); crypto_digest_update(tfm, sg, 1);
process_xdr_buf(body, body_offset, body->len - body_offset, process_xdr_buf(body, body_offset, body->len - body_offset,
checksummer, tfm); checksummer, tfm);