Re: [PATCH v4] lib: add size unit t/p/e to memparse
Hi Gui, (2014/06/18 7:21), David Rientjes wrote: On Fri, 13 Jun 2014, Gui Hecheng wrote: For modern filesystems such as btrfs, t/p/e size level operations are common. add size unit t/p/e parsing to memparse Signed-off-by: Gui Hecheng Acked-by: David Rientjes It looks good to me. Reviewed-by: Satoru Takeuchi Thanks, Satoru Sorry, didn't do this before. Good luck with the simple_strto*() work! -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 13 Jun 2014, Gui Hecheng wrote: > For modern filesystems such as btrfs, t/p/e size level operations > are common. > add size unit t/p/e parsing to memparse > > Signed-off-by: Gui Hecheng Acked-by: David Rientjes Sorry, didn't do this before. Good luck with the simple_strto*() work! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 13 Jun 2014, Gui Hecheng wrote: For modern filesystems such as btrfs, t/p/e size level operations are common. add size unit t/p/e parsing to memparse Signed-off-by: Gui Hecheng guihc.f...@cn.fujitsu.com Acked-by: David Rientjes rient...@google.com Sorry, didn't do this before. Good luck with the simple_strto*() work! -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
Hi Gui, (2014/06/18 7:21), David Rientjes wrote: On Fri, 13 Jun 2014, Gui Hecheng wrote: For modern filesystems such as btrfs, t/p/e size level operations are common. add size unit t/p/e parsing to memparse Signed-off-by: Gui Hecheng guihc.f...@cn.fujitsu.com Acked-by: David Rientjes rient...@google.com It looks good to me. Reviewed-by: Satoru Takeuchi takeuchi_sat...@jp.fujitsu.com Thanks, Satoru Sorry, didn't do this before. Good luck with the simple_strto*() work! -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Mon, 2014-06-16 at 18:29 -0700, David Rientjes wrote:
> On Tue, 17 Jun 2014, Gui Hecheng wrote:
>
> > > > diff --git a/lib/cmdline.c b/lib/cmdline.c
> > > > index d4932f7..76a712e 100644
> > > > --- a/lib/cmdline.c
> > > > +++ b/lib/cmdline.c
> > > > @@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
> > > > * @retptr: (output) Optional pointer to next char after parse
> > > > completes
> > > > *
> > > > * Parses a string into a number. The number stored at @ptr is
> > > > - * potentially suffixed with %K (for kilobytes, or 1024 bytes),
> > > > - * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
> > > > - * 1073741824). If the number is suffixed with K, M, or G, then
> > > > - * the return value is the number multiplied by one kilobyte, one
> > > > - * megabyte, or one gigabyte, respectively.
> > > > + * potentially suffixed with K, M, G, T, P, E.
> > > > */
> > > >
> > > > unsigned long long memparse(const char *ptr, char **retptr)
> > > > @@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
> > > > **retptr)
> > > > unsigned long long ret = simple_strtoull(ptr, , 0);
> > > >
> > > > switch (*endptr) {
> > > > + case 'E':
> > > > + case 'e':
> > > > + ret <<= 10;
> > > > + case 'P':
> > > > + case 'p':
> > > > + ret <<= 10;
> > > > + case 'T':
> > > > + case 't':
> > > > + ret <<= 10;
> > > > case 'G':
> > > > case 'g':
> > > > ret <<= 10;
> > >
> > > Seems fine since unsigned long long is always at least 64 bits, but
> > > perhaps also change simple_strtoull() to use kstrtoull() at the same time
> > > since the former is deprecated?
> >
> > Yes, that is a point. But the deprecated function is a separate problem
> > and may not be included in this patch.
> > Also, I find that simple_strtoull is used in many places in the kernel
> > code, it is better to replace it globally?
> >
>
> If you're going to have a go at replacing the simple_strto*() functions
> throughout the kernel, it's probably better to do it per subsystem (as
> defined by the separate sections of MAINTAINERS) and propose the patches
> individually to those maintainers. Once it has been removed entirely, you
> can submit a patch to remove the functions themselves.
>
> Be aware that there are many callers to the deprecated functions so it may
> take a significant amount of time.
H...It may really take a long time. But I am not sure whether this
is really a good idea to do this big replacement. Let's see whether
anyone would like to share his opinions.
-Gui
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Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Tue, 17 Jun 2014, Gui Hecheng wrote:
> > > diff --git a/lib/cmdline.c b/lib/cmdline.c
> > > index d4932f7..76a712e 100644
> > > --- a/lib/cmdline.c
> > > +++ b/lib/cmdline.c
> > > @@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
> > > * @retptr: (output) Optional pointer to next char after parse
> > > completes
> > > *
> > > * Parses a string into a number. The number stored at @ptr is
> > > - * potentially suffixed with %K (for kilobytes, or 1024 bytes),
> > > - * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
> > > - * 1073741824). If the number is suffixed with K, M, or G, then
> > > - * the return value is the number multiplied by one kilobyte, one
> > > - * megabyte, or one gigabyte, respectively.
> > > + * potentially suffixed with K, M, G, T, P, E.
> > > */
> > >
> > > unsigned long long memparse(const char *ptr, char **retptr)
> > > @@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
> > > **retptr)
> > > unsigned long long ret = simple_strtoull(ptr, , 0);
> > >
> > > switch (*endptr) {
> > > + case 'E':
> > > + case 'e':
> > > + ret <<= 10;
> > > + case 'P':
> > > + case 'p':
> > > + ret <<= 10;
> > > + case 'T':
> > > + case 't':
> > > + ret <<= 10;
> > > case 'G':
> > > case 'g':
> > > ret <<= 10;
> >
> > Seems fine since unsigned long long is always at least 64 bits, but
> > perhaps also change simple_strtoull() to use kstrtoull() at the same time
> > since the former is deprecated?
>
> Yes, that is a point. But the deprecated function is a separate problem
> and may not be included in this patch.
> Also, I find that simple_strtoull is used in many places in the kernel
> code, it is better to replace it globally?
>
If you're going to have a go at replacing the simple_strto*() functions
throughout the kernel, it's probably better to do it per subsystem (as
defined by the separate sections of MAINTAINERS) and propose the patches
individually to those maintainers. Once it has been removed entirely, you
can submit a patch to remove the functions themselves.
Be aware that there are many callers to the deprecated functions so it may
take a significant amount of time.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
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Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 2014-06-13 at 14:58 -0700, David Rientjes wrote:
> On Fri, 13 Jun 2014, Gui Hecheng wrote:
>
> > diff --git a/lib/cmdline.c b/lib/cmdline.c
> > index d4932f7..76a712e 100644
> > --- a/lib/cmdline.c
> > +++ b/lib/cmdline.c
> > @@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
> > * @retptr: (output) Optional pointer to next char after parse completes
> > *
> > * Parses a string into a number. The number stored at @ptr is
> > - * potentially suffixed with %K (for kilobytes, or 1024 bytes),
> > - * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
> > - * 1073741824). If the number is suffixed with K, M, or G, then
> > - * the return value is the number multiplied by one kilobyte, one
> > - * megabyte, or one gigabyte, respectively.
> > + * potentially suffixed with K, M, G, T, P, E.
> > */
> >
> > unsigned long long memparse(const char *ptr, char **retptr)
> > @@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
> > **retptr)
> > unsigned long long ret = simple_strtoull(ptr, , 0);
> >
> > switch (*endptr) {
> > + case 'E':
> > + case 'e':
> > + ret <<= 10;
> > + case 'P':
> > + case 'p':
> > + ret <<= 10;
> > + case 'T':
> > + case 't':
> > + ret <<= 10;
> > case 'G':
> > case 'g':
> > ret <<= 10;
>
> Seems fine since unsigned long long is always at least 64 bits, but
> perhaps also change simple_strtoull() to use kstrtoull() at the same time
> since the former is deprecated?
Yes, that is a point. But the deprecated function is a separate problem
and may not be included in this patch.
Also, I find that simple_strtoull is used in many places in the kernel
code, it is better to replace it globally?
-Gui
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Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 2014-06-13 at 14:58 -0700, David Rientjes wrote:
On Fri, 13 Jun 2014, Gui Hecheng wrote:
diff --git a/lib/cmdline.c b/lib/cmdline.c
index d4932f7..76a712e 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
* @retptr: (output) Optional pointer to next char after parse completes
*
* Parses a string into a number. The number stored at @ptr is
- * potentially suffixed with %K (for kilobytes, or 1024 bytes),
- * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
- * 1073741824). If the number is suffixed with K, M, or G, then
- * the return value is the number multiplied by one kilobyte, one
- * megabyte, or one gigabyte, respectively.
+ * potentially suffixed with K, M, G, T, P, E.
*/
unsigned long long memparse(const char *ptr, char **retptr)
@@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
**retptr)
unsigned long long ret = simple_strtoull(ptr, endptr, 0);
switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret = 10;
+ case 'P':
+ case 'p':
+ ret = 10;
+ case 'T':
+ case 't':
+ ret = 10;
case 'G':
case 'g':
ret = 10;
Seems fine since unsigned long long is always at least 64 bits, but
perhaps also change simple_strtoull() to use kstrtoull() at the same time
since the former is deprecated?
Yes, that is a point. But the deprecated function is a separate problem
and may not be included in this patch.
Also, I find that simple_strtoull is used in many places in the kernel
code, it is better to replace it globally?
-Gui
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the body of a message to majord...@vger.kernel.org
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Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Tue, 17 Jun 2014, Gui Hecheng wrote:
diff --git a/lib/cmdline.c b/lib/cmdline.c
index d4932f7..76a712e 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
* @retptr: (output) Optional pointer to next char after parse
completes
*
* Parses a string into a number. The number stored at @ptr is
- * potentially suffixed with %K (for kilobytes, or 1024 bytes),
- * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
- * 1073741824). If the number is suffixed with K, M, or G, then
- * the return value is the number multiplied by one kilobyte, one
- * megabyte, or one gigabyte, respectively.
+ * potentially suffixed with K, M, G, T, P, E.
*/
unsigned long long memparse(const char *ptr, char **retptr)
@@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
**retptr)
unsigned long long ret = simple_strtoull(ptr, endptr, 0);
switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret = 10;
+ case 'P':
+ case 'p':
+ ret = 10;
+ case 'T':
+ case 't':
+ ret = 10;
case 'G':
case 'g':
ret = 10;
Seems fine since unsigned long long is always at least 64 bits, but
perhaps also change simple_strtoull() to use kstrtoull() at the same time
since the former is deprecated?
Yes, that is a point. But the deprecated function is a separate problem
and may not be included in this patch.
Also, I find that simple_strtoull is used in many places in the kernel
code, it is better to replace it globally?
If you're going to have a go at replacing the simple_strto*() functions
throughout the kernel, it's probably better to do it per subsystem (as
defined by the separate sections of MAINTAINERS) and propose the patches
individually to those maintainers. Once it has been removed entirely, you
can submit a patch to remove the functions themselves.
Be aware that there are many callers to the deprecated functions so it may
take a significant amount of time.
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Mon, 2014-06-16 at 18:29 -0700, David Rientjes wrote:
On Tue, 17 Jun 2014, Gui Hecheng wrote:
diff --git a/lib/cmdline.c b/lib/cmdline.c
index d4932f7..76a712e 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
* @retptr: (output) Optional pointer to next char after parse
completes
*
* Parses a string into a number. The number stored at @ptr is
- * potentially suffixed with %K (for kilobytes, or 1024 bytes),
- * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
- * 1073741824). If the number is suffixed with K, M, or G, then
- * the return value is the number multiplied by one kilobyte, one
- * megabyte, or one gigabyte, respectively.
+ * potentially suffixed with K, M, G, T, P, E.
*/
unsigned long long memparse(const char *ptr, char **retptr)
@@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
**retptr)
unsigned long long ret = simple_strtoull(ptr, endptr, 0);
switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret = 10;
+ case 'P':
+ case 'p':
+ ret = 10;
+ case 'T':
+ case 't':
+ ret = 10;
case 'G':
case 'g':
ret = 10;
Seems fine since unsigned long long is always at least 64 bits, but
perhaps also change simple_strtoull() to use kstrtoull() at the same time
since the former is deprecated?
Yes, that is a point. But the deprecated function is a separate problem
and may not be included in this patch.
Also, I find that simple_strtoull is used in many places in the kernel
code, it is better to replace it globally?
If you're going to have a go at replacing the simple_strto*() functions
throughout the kernel, it's probably better to do it per subsystem (as
defined by the separate sections of MAINTAINERS) and propose the patches
individually to those maintainers. Once it has been removed entirely, you
can submit a patch to remove the functions themselves.
Be aware that there are many callers to the deprecated functions so it may
take a significant amount of time.
H...It may really take a long time. But I am not sure whether this
is really a good idea to do this big replacement. Let's see whether
anyone would like to share his opinions.
-Gui
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 13 Jun 2014, Gui Hecheng wrote:
> diff --git a/lib/cmdline.c b/lib/cmdline.c
> index d4932f7..76a712e 100644
> --- a/lib/cmdline.c
> +++ b/lib/cmdline.c
> @@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
> * @retptr: (output) Optional pointer to next char after parse completes
> *
> * Parses a string into a number. The number stored at @ptr is
> - * potentially suffixed with %K (for kilobytes, or 1024 bytes),
> - * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
> - * 1073741824). If the number is suffixed with K, M, or G, then
> - * the return value is the number multiplied by one kilobyte, one
> - * megabyte, or one gigabyte, respectively.
> + * potentially suffixed with K, M, G, T, P, E.
> */
>
> unsigned long long memparse(const char *ptr, char **retptr)
> @@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
> **retptr)
> unsigned long long ret = simple_strtoull(ptr, , 0);
>
> switch (*endptr) {
> + case 'E':
> + case 'e':
> + ret <<= 10;
> + case 'P':
> + case 'p':
> + ret <<= 10;
> + case 'T':
> + case 't':
> + ret <<= 10;
> case 'G':
> case 'g':
> ret <<= 10;
Seems fine since unsigned long long is always at least 64 bits, but
perhaps also change simple_strtoull() to use kstrtoull() at the same time
since the former is deprecated?
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Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 2014-06-13 at 07:55 +0200, Brendan Hide wrote:
> On 13/06/14 03:42, Gui Hecheng wrote:
> > For modern filesystems such as btrfs, t/p/e size level operations
> > are common.
> > add size unit t/p/e parsing to memparse
> >
> > Signed-off-by: Gui Hecheng
> > ---
> > changelog
> > v1->v2: replace kilobyte with kibibyte, and others
> > v2->v3: add missing unit "bytes" in comment
> > v3->v4: remove idiotic name for K,M,G,P,T,E
> > ---
> > lib/cmdline.c | 15 ++-
> > 1 file changed, 10 insertions(+), 5 deletions(-)
> >
> > diff --git a/lib/cmdline.c b/lib/cmdline.c
> > index d4932f7..76a712e 100644
> > --- a/lib/cmdline.c
> > +++ b/lib/cmdline.c
> > @@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
> >*@retptr: (output) Optional pointer to next char after parse
> > completes
> >*
> >*Parses a string into a number. The number stored at @ptr is
> > - * potentially suffixed with %K (for kilobytes, or 1024 bytes),
> > - * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
> > - * 1073741824). If the number is suffixed with K, M, or G, then
> > - * the return value is the number multiplied by one kilobyte, one
> > - * megabyte, or one gigabyte, respectively.
> > + * potentially suffixed with K, M, G, T, P, E.
> >*/
> >
> > unsigned long long memparse(const char *ptr, char **retptr)
> > @@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
> > **retptr)
> > unsigned long long ret = simple_strtoull(ptr, , 0);
> >
> > switch (*endptr) {
> > + case 'E':
> > + case 'e':
> > + ret <<= 10;
> > + case 'P':
> > + case 'p':
> > + ret <<= 10;
> > + case 'T':
> > + case 't':
> > + ret <<= 10;
> > case 'G':
> > case 'g':
> > ret <<= 10;
> Ah, I see - you've removed all reference to their names. That's good too. :)
>
Thank you for your review!
I think maybe more people would like cleaner things in the kernel.
-Gui
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Re: [PATCH v4] lib: add size unit t/p/e to memparse
On 13/06/14 03:42, Gui Hecheng wrote:
For modern filesystems such as btrfs, t/p/e size level operations
are common.
add size unit t/p/e parsing to memparse
Signed-off-by: Gui Hecheng
---
changelog
v1->v2: replace kilobyte with kibibyte, and others
v2->v3: add missing unit "bytes" in comment
v3->v4: remove idiotic name for K,M,G,P,T,E
---
lib/cmdline.c | 15 ++-
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/lib/cmdline.c b/lib/cmdline.c
index d4932f7..76a712e 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
*@retptr: (output) Optional pointer to next char after parse completes
*
*Parses a string into a number. The number stored at @ptr is
- * potentially suffixed with %K (for kilobytes, or 1024 bytes),
- * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
- * 1073741824). If the number is suffixed with K, M, or G, then
- * the return value is the number multiplied by one kilobyte, one
- * megabyte, or one gigabyte, respectively.
+ * potentially suffixed with K, M, G, T, P, E.
*/
unsigned long long memparse(const char *ptr, char **retptr)
@@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char **retptr)
unsigned long long ret = simple_strtoull(ptr, , 0);
switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret <<= 10;
+ case 'P':
+ case 'p':
+ ret <<= 10;
+ case 'T':
+ case 't':
+ ret <<= 10;
case 'G':
case 'g':
ret <<= 10;
Ah, I see - you've removed all reference to their names. That's good too. :)
--
__
Brendan Hide
http://swiftspirit.co.za/
http://www.webafrica.co.za/?AFF1E97
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Re: [PATCH v4] lib: add size unit t/p/e to memparse
On 13/06/14 03:42, Gui Hecheng wrote:
For modern filesystems such as btrfs, t/p/e size level operations
are common.
add size unit t/p/e parsing to memparse
Signed-off-by: Gui Hecheng guihc.f...@cn.fujitsu.com
---
changelog
v1-v2: replace kilobyte with kibibyte, and others
v2-v3: add missing unit bytes in comment
v3-v4: remove idiotic name for K,M,G,P,T,E
---
lib/cmdline.c | 15 ++-
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/lib/cmdline.c b/lib/cmdline.c
index d4932f7..76a712e 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
*@retptr: (output) Optional pointer to next char after parse completes
*
*Parses a string into a number. The number stored at @ptr is
- * potentially suffixed with %K (for kilobytes, or 1024 bytes),
- * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
- * 1073741824). If the number is suffixed with K, M, or G, then
- * the return value is the number multiplied by one kilobyte, one
- * megabyte, or one gigabyte, respectively.
+ * potentially suffixed with K, M, G, T, P, E.
*/
unsigned long long memparse(const char *ptr, char **retptr)
@@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char **retptr)
unsigned long long ret = simple_strtoull(ptr, endptr, 0);
switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret = 10;
+ case 'P':
+ case 'p':
+ ret = 10;
+ case 'T':
+ case 't':
+ ret = 10;
case 'G':
case 'g':
ret = 10;
Ah, I see - you've removed all reference to their names. That's good too. :)
--
__
Brendan Hide
http://swiftspirit.co.za/
http://www.webafrica.co.za/?AFF1E97
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Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 2014-06-13 at 07:55 +0200, Brendan Hide wrote:
On 13/06/14 03:42, Gui Hecheng wrote:
For modern filesystems such as btrfs, t/p/e size level operations
are common.
add size unit t/p/e parsing to memparse
Signed-off-by: Gui Hecheng guihc.f...@cn.fujitsu.com
---
changelog
v1-v2: replace kilobyte with kibibyte, and others
v2-v3: add missing unit bytes in comment
v3-v4: remove idiotic name for K,M,G,P,T,E
---
lib/cmdline.c | 15 ++-
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/lib/cmdline.c b/lib/cmdline.c
index d4932f7..76a712e 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
*@retptr: (output) Optional pointer to next char after parse
completes
*
*Parses a string into a number. The number stored at @ptr is
- * potentially suffixed with %K (for kilobytes, or 1024 bytes),
- * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
- * 1073741824). If the number is suffixed with K, M, or G, then
- * the return value is the number multiplied by one kilobyte, one
- * megabyte, or one gigabyte, respectively.
+ * potentially suffixed with K, M, G, T, P, E.
*/
unsigned long long memparse(const char *ptr, char **retptr)
@@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
**retptr)
unsigned long long ret = simple_strtoull(ptr, endptr, 0);
switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret = 10;
+ case 'P':
+ case 'p':
+ ret = 10;
+ case 'T':
+ case 't':
+ ret = 10;
case 'G':
case 'g':
ret = 10;
Ah, I see - you've removed all reference to their names. That's good too. :)
Thank you for your review!
I think maybe more people would like cleaner things in the kernel.
-Gui
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Re: [PATCH v4] lib: add size unit t/p/e to memparse
On Fri, 13 Jun 2014, Gui Hecheng wrote:
diff --git a/lib/cmdline.c b/lib/cmdline.c
index d4932f7..76a712e 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -121,11 +121,7 @@ EXPORT_SYMBOL(get_options);
* @retptr: (output) Optional pointer to next char after parse completes
*
* Parses a string into a number. The number stored at @ptr is
- * potentially suffixed with %K (for kilobytes, or 1024 bytes),
- * %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
- * 1073741824). If the number is suffixed with K, M, or G, then
- * the return value is the number multiplied by one kilobyte, one
- * megabyte, or one gigabyte, respectively.
+ * potentially suffixed with K, M, G, T, P, E.
*/
unsigned long long memparse(const char *ptr, char **retptr)
@@ -135,6 +131,15 @@ unsigned long long memparse(const char *ptr, char
**retptr)
unsigned long long ret = simple_strtoull(ptr, endptr, 0);
switch (*endptr) {
+ case 'E':
+ case 'e':
+ ret = 10;
+ case 'P':
+ case 'p':
+ ret = 10;
+ case 'T':
+ case 't':
+ ret = 10;
case 'G':
case 'g':
ret = 10;
Seems fine since unsigned long long is always at least 64 bits, but
perhaps also change simple_strtoull() to use kstrtoull() at the same time
since the former is deprecated?
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