linux-toradex.git/include/linux/string.h, branch Colibri_T30_LinuxImageV2.1Beta2_20140206

Add a strtobool function matching semantics of existing in kernel equivalents

2011-05-19T07:25:28+00:00

This is a rename of the usr_strtobool proposal, which was a renamed,
relocated and fixed version of previous kstrtobool RFC

Signed-off-by: Jonathan Cameron 
Signed-off-by: Rusty Russell

lib: Introduce strnstr()

2010-01-15T03:38:09+00:00

It differs strstr() in that it limits the length to be searched
in the first string.

Signed-off-by: Li Zefan 
LKML-Reference: <4B4E8743.6030805@cn.fujitsu.com>
Acked-by: Frederic Weisbecker 
Signed-off-by: Steven Rostedt

Subject: Re: [PATCH] strstrip incorrectly marked __must_check

2009-12-15T16:53:34+00:00

Recently, We marked strstrip() as must_check.  because it was frequently
misused and it should be checked.  However, we found one exception.
scsi/ipr.c intentionally ignore return value of strstrip.  Because it
wishes to keep the whitespace at the beginning.

Thus we need to keep with and without checked whitespace trim function.
This patch adds a new strim() and changes ipr.c to use it.

[akpm@linux-foundation.org: coding-style fixes]
Suggested-by: Alan Cox 
Signed-off-by: KOSAKI Motohiro 
Cc: James Bottomley 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

string: factorize skip_spaces and export it to be generally available

2009-12-15T16:53:32+00:00

On the following sentence:
    while (*s && isspace(*s))
        s++;

If *s == 0, isspace() evaluates to ((_ctype[*s] & 0x20) != 0), which
evaluates to ((0x08 & 0x20) != 0) which equals to 0 as well.
If *s == 1, we depend on isspace() result anyway. In other words,
"a char equals zero is never a space", so remove this check.

Also, *s != 0 is most common case (non-null string).

Fixed const return as noticed by Jan Engelhardt and James Bottomley.
Fixed unnecessary extra cast on strstrip() as noticed by Jan Engelhardt.

Signed-off-by: André Goddard Rosa 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

strstrip(): mark as as must_check

2009-10-29T14:39:25+00:00

strstrip() can return a modified value of its input argument, when
removing elading whitesapce.  So it is surely bug for this function's
return value to be ignored.  The caller is probably going to use the
incorrect original pointer.

So mark it __must_check to prevent this frm happening (as it has before).

Signed-off-by: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param

2009-04-05T17:30:21+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param:
  module: use strstarts()
  strstarts: helper function for !strncmp(str, prefix, strlen(prefix))
  arm: allow usage of string functions in linux/string.h
  module: don't use stop_machine on module load
  module: create a request_module_nowait()
  module: include other structures in module version check
  module: remove the SHF_ALLOC flag on the __versions section.
  module: clarify the force-loading taint message.
  module: Export symbols needed for Ksplice
  Ksplice: Add functions for walking kallsyms symbols
  module: remove module_text_address()
  module: __module_address
  module: Make find_symbol return a struct kernel_symbol
  kernel/module.c: fix an unused goto label
  param: fix charp parameters set via sysfs

Fix trivial conflicts in kernel/extable.c manually.

Merge branch 'printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05T17:23:25+00:00

* 'printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  printk: correct the behavior of printk_timed_ratelimit()
  vsprintf: unify the format decoding layer for its 3 users, cleanup
  fix regression from "vsprintf: unify the format decoding layer for its 3 users"
  vsprintf: fix bug in negative value printing
  vsprintf: unify the format decoding layer for its 3 users
  vsprintf: add binary printf
  printk: introduce printk_once()

Fix trivial conflicts (printk_once vs log_buf_kexec_setup() added near
each other) in include/linux/kernel.h.

memdup_user(): introduce

2009-04-01T15:59:13+00:00

I notice there are many places doing copy_from_user() which follows
kmalloc():

        dst = kmalloc(len, GFP_KERNEL);
        if (!dst)
                return -ENOMEM;
        if (copy_from_user(dst, src, len)) {
		kfree(dst);
		return -EFAULT
	}

memdup_user() is a wrapper of the above code.  With this new function, we
don't have to write 'len' twice, which can lead to typos/mistakes.  It
also produces smaller code and kernel text.

A quick grep shows 250+ places where memdup_user() *may* be used.  I'll
prepare a patchset to do this conversion.

Signed-off-by: Li Zefan 
Cc: KOSAKI Motohiro 
Cc: Americo Wang 
Cc: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

strstarts: helper function for !strncmp(str, prefix, strlen(prefix))

2009-03-31T02:35:36+00:00

Impact: minor new API

ksplice added a "starts_with" function, which seems like a common need.
When people open-code it they seem to use fixed numbers rather than strlen,
so it's quite a readability win (also, strncmp() almost always wants != 0
on it).

So here's strstarts().

Cc: Anders Kaseorg 
Cc: Jeff Arnold 
Cc: Tim Abbott 
Signed-off-by: Rusty Russell

vsprintf: add binary printf

2009-03-06T16:39:04+00:00

Impact: add new APIs for binary trace printk infrastructure

vbin_printf(): write args to binary buffer, string is copied
when "%s" is occurred.

bstr_printf(): read from binary buffer for args and format a string

[fweisbec@gmail.com: rebase]

Signed-off-by: Lai Jiangshan 
Signed-off-by: Frederic Weisbecker 
Cc: Linus Torvalds 
LKML-Reference: <1236356510-8381-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar