* [PATCH v2] scsi: sd: Make protection lookup tables static and relocate functions
@ 2019-01-08 15:14 ` John Garry
0 siblings, 0 replies; 5+ messages in thread
From: John Garry @ 2019-01-08 15:14 UTC (permalink / raw)
To: jejb, martin.petersen; +Cc: linuxarm, linux-kernel, linux-scsi, John Garry
Currently the protection lookup tables in sd_prot_flag_mask() and
sd_prot_op() are declared as non-static. As such, they will be rebuilt
for each respective function call.
Optimise by making them static.
This saves ~100B object code for sd.c:
Before:
text data bss dec hex filename
25403 1024 16 26443 674b drivers/scsi/sd.o
After:
text data bss dec hex filename
25299 1024 16 26339 66e3 drivers/scsi/sd.o
In addition, since those same functions are declared in sd.h, but each are
only referenced in sd.c, relocate them to that same c file.
The inline specifier is dropped also, since gcc should be able to make the
decision to inline.
Signed-off-by: John Garry <john.garry@huawei.com>
---
Differences v1->v2:
- relocate functions to sd.c and drop inline specifier
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 3bb2b33..e7dcc02 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -658,6 +658,68 @@ static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
}
#endif /* CONFIG_BLK_SED_OPAL */
+/*
+ * Look up the DIX operation based on whether the command is read or
+ * write and whether dix and dif are enabled.
+ */
+static unsigned int sd_prot_op(bool write, bool dix, bool dif)
+{
+ /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
+ static const unsigned int ops[] = { /* wrt dix dif */
+ SCSI_PROT_NORMAL, /* 0 0 0 */
+ SCSI_PROT_READ_STRIP, /* 0 0 1 */
+ SCSI_PROT_READ_INSERT, /* 0 1 0 */
+ SCSI_PROT_READ_PASS, /* 0 1 1 */
+ SCSI_PROT_NORMAL, /* 1 0 0 */
+ SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
+ SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
+ SCSI_PROT_WRITE_PASS, /* 1 1 1 */
+ };
+
+ return ops[write << 2 | dix << 1 | dif];
+}
+
+/*
+ * Returns a mask of the protection flags that are valid for a given DIX
+ * operation.
+ */
+static unsigned int sd_prot_flag_mask(unsigned int prot_op)
+{
+ static const unsigned int flag_mask[] = {
+ [SCSI_PROT_NORMAL] = 0,
+
+ [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT,
+
+ [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_REF_INCREMENT,
+
+ [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+ };
+
+ return flag_mask[prot_op];
+}
+
static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
unsigned int dix, unsigned int dif)
{
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
index 1d63f3a..6e68baf 100644
--- a/drivers/scsi/sd.h
+++ b/drivers/scsi/sd.h
@@ -188,68 +188,6 @@ static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sec
return sector >> (ilog2(sdev->sector_size) - 9);
}
-/*
- * Look up the DIX operation based on whether the command is read or
- * write and whether dix and dif are enabled.
- */
-static inline unsigned int sd_prot_op(bool write, bool dix, bool dif)
-{
- /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
- const unsigned int ops[] = { /* wrt dix dif */
- SCSI_PROT_NORMAL, /* 0 0 0 */
- SCSI_PROT_READ_STRIP, /* 0 0 1 */
- SCSI_PROT_READ_INSERT, /* 0 1 0 */
- SCSI_PROT_READ_PASS, /* 0 1 1 */
- SCSI_PROT_NORMAL, /* 1 0 0 */
- SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
- SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
- SCSI_PROT_WRITE_PASS, /* 1 1 1 */
- };
-
- return ops[write << 2 | dix << 1 | dif];
-}
-
-/*
- * Returns a mask of the protection flags that are valid for a given DIX
- * operation.
- */
-static inline unsigned int sd_prot_flag_mask(unsigned int prot_op)
-{
- const unsigned int flag_mask[] = {
- [SCSI_PROT_NORMAL] = 0,
-
- [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT,
-
- [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
-
- [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
-
- [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_REF_INCREMENT,
-
- [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
-
- [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
- };
-
- return flag_mask[prot_op];
-}
-
#ifdef CONFIG_BLK_DEV_INTEGRITY
extern void sd_dif_config_host(struct scsi_disk *);
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v2] scsi: sd: Make protection lookup tables static and relocate functions
@ 2019-01-08 15:14 ` John Garry
0 siblings, 0 replies; 5+ messages in thread
From: John Garry @ 2019-01-08 15:14 UTC (permalink / raw)
To: jejb, martin.petersen; +Cc: linuxarm, linux-kernel, linux-scsi, John Garry
Currently the protection lookup tables in sd_prot_flag_mask() and
sd_prot_op() are declared as non-static. As such, they will be rebuilt
for each respective function call.
Optimise by making them static.
This saves ~100B object code for sd.c:
Before:
text data bss dec hex filename
25403 1024 16 26443 674b drivers/scsi/sd.o
After:
text data bss dec hex filename
25299 1024 16 26339 66e3 drivers/scsi/sd.o
In addition, since those same functions are declared in sd.h, but each are
only referenced in sd.c, relocate them to that same c file.
The inline specifier is dropped also, since gcc should be able to make the
decision to inline.
Signed-off-by: John Garry <john.garry@huawei.com>
---
Differences v1->v2:
- relocate functions to sd.c and drop inline specifier
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 3bb2b33..e7dcc02 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -658,6 +658,68 @@ static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
}
#endif /* CONFIG_BLK_SED_OPAL */
+/*
+ * Look up the DIX operation based on whether the command is read or
+ * write and whether dix and dif are enabled.
+ */
+static unsigned int sd_prot_op(bool write, bool dix, bool dif)
+{
+ /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
+ static const unsigned int ops[] = { /* wrt dix dif */
+ SCSI_PROT_NORMAL, /* 0 0 0 */
+ SCSI_PROT_READ_STRIP, /* 0 0 1 */
+ SCSI_PROT_READ_INSERT, /* 0 1 0 */
+ SCSI_PROT_READ_PASS, /* 0 1 1 */
+ SCSI_PROT_NORMAL, /* 1 0 0 */
+ SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
+ SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
+ SCSI_PROT_WRITE_PASS, /* 1 1 1 */
+ };
+
+ return ops[write << 2 | dix << 1 | dif];
+}
+
+/*
+ * Returns a mask of the protection flags that are valid for a given DIX
+ * operation.
+ */
+static unsigned int sd_prot_flag_mask(unsigned int prot_op)
+{
+ static const unsigned int flag_mask[] = {
+ [SCSI_PROT_NORMAL] = 0,
+
+ [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT,
+
+ [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_REF_INCREMENT,
+
+ [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+ };
+
+ return flag_mask[prot_op];
+}
+
static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
unsigned int dix, unsigned int dif)
{
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
index 1d63f3a..6e68baf 100644
--- a/drivers/scsi/sd.h
+++ b/drivers/scsi/sd.h
@@ -188,68 +188,6 @@ static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sec
return sector >> (ilog2(sdev->sector_size) - 9);
}
-/*
- * Look up the DIX operation based on whether the command is read or
- * write and whether dix and dif are enabled.
- */
-static inline unsigned int sd_prot_op(bool write, bool dix, bool dif)
-{
- /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
- const unsigned int ops[] = { /* wrt dix dif */
- SCSI_PROT_NORMAL, /* 0 0 0 */
- SCSI_PROT_READ_STRIP, /* 0 0 1 */
- SCSI_PROT_READ_INSERT, /* 0 1 0 */
- SCSI_PROT_READ_PASS, /* 0 1 1 */
- SCSI_PROT_NORMAL, /* 1 0 0 */
- SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
- SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
- SCSI_PROT_WRITE_PASS, /* 1 1 1 */
- };
-
- return ops[write << 2 | dix << 1 | dif];
-}
-
-/*
- * Returns a mask of the protection flags that are valid for a given DIX
- * operation.
- */
-static inline unsigned int sd_prot_flag_mask(unsigned int prot_op)
-{
- const unsigned int flag_mask[] = {
- [SCSI_PROT_NORMAL] = 0,
-
- [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT,
-
- [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
-
- [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
-
- [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_REF_INCREMENT,
-
- [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
-
- [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
- SCSI_PROT_GUARD_CHECK |
- SCSI_PROT_REF_CHECK |
- SCSI_PROT_REF_INCREMENT |
- SCSI_PROT_IP_CHECKSUM,
- };
-
- return flag_mask[prot_op];
-}
-
#ifdef CONFIG_BLK_DEV_INTEGRITY
extern void sd_dif_config_host(struct scsi_disk *);
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v2] scsi: sd: Make protection lookup tables static and relocate functions
2019-01-08 15:14 ` John Garry
(?)
@ 2019-01-09 2:42 ` Bart Van Assche
-1 siblings, 0 replies; 5+ messages in thread
From: Bart Van Assche @ 2019-01-09 2:42 UTC (permalink / raw)
To: John Garry, jejb, martin.petersen; +Cc: linuxarm, linux-kernel, linux-scsi
On 1/8/19 7:14 AM, John Garry wrote:
> Currently the protection lookup tables in sd_prot_flag_mask() and
> sd_prot_op() are declared as non-static. As such, they will be rebuilt
> for each respective function call.
>
> Optimise by making them static.
>
> This saves ~100B object code for sd.c:
>
> Before:
> text data bss dec hex filename
> 25403 1024 16 26443 674b drivers/scsi/sd.o
>
> After:
> text data bss dec hex filename
> 25299 1024 16 26339 66e3 drivers/scsi/sd.o
>
> In addition, since those same functions are declared in sd.h, but each are
> only referenced in sd.c, relocate them to that same c file.
>
> The inline specifier is dropped also, since gcc should be able to make the
> decision to inline.
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2] scsi: sd: Make protection lookup tables static and relocate functions
2019-01-08 15:14 ` John Garry
@ 2019-01-09 3:30 ` Martin K. Petersen
-1 siblings, 0 replies; 5+ messages in thread
From: Martin K. Petersen @ 2019-01-09 3:30 UTC (permalink / raw)
To: John Garry; +Cc: jejb, martin.petersen, linuxarm, linux-kernel, linux-scsi
John,
> Currently the protection lookup tables in sd_prot_flag_mask() and
> sd_prot_op() are declared as non-static. As such, they will be rebuilt
> for each respective function call.
>
> Optimise by making them static.
Applied to 5.1/scsi-queue, thank you!
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2] scsi: sd: Make protection lookup tables static and relocate functions
@ 2019-01-09 3:30 ` Martin K. Petersen
0 siblings, 0 replies; 5+ messages in thread
From: Martin K. Petersen @ 2019-01-09 3:30 UTC (permalink / raw)
To: John Garry; +Cc: jejb, martin.petersen, linuxarm, linux-kernel, linux-scsi
John,
> Currently the protection lookup tables in sd_prot_flag_mask() and
> sd_prot_op() are declared as non-static. As such, they will be rebuilt
> for each respective function call.
>
> Optimise by making them static.
Applied to 5.1/scsi-queue, thank you!
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-01-09 3:30 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2019-01-08 15:14 [PATCH v2] scsi: sd: Make protection lookup tables static and relocate functions John Garry
2019-01-08 15:14 ` John Garry
2019-01-09 2:42 ` Bart Van Assche
2019-01-09 3:30 ` Martin K. Petersen
2019-01-09 3:30 ` Martin K. Petersen
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