All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH] x86: Do not force removal of __user when calling copy_to/from_user_nocheck()
@ 2014-01-03 21:45 Steven Rostedt
  2014-01-03 22:46 ` [tip:x86/build] x86, sparse: " tip-bot for Steven Rostedt
  2014-01-04 22:04 ` tip-bot for Steven Rostedt
  0 siblings, 2 replies; 3+ messages in thread
From: Steven Rostedt @ 2014-01-03 21:45 UTC (permalink / raw)
  To: H. Peter Anvin, LKML; +Cc: Ingo Molnar, Thomas Gleixner, Andi Kleen


Commit ff47ab4ff3cdd "x86: Add 1/2/4/8 byte optimization to 64bit
__copy_{from,to}_user_inatomic" added a "_nocheck" call in between
the copy_to/from_user() and copy_user_generic(). As both the
normal and nocheck versions of theses calls use the proper __user
annotation, a typecast to remove it should not be added.
This causes sparse to spin out the following warnings:

arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>

Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 arch/x86/include/asm/uaccess_64.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 190413d..12a26b9 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -204,13 +204,13 @@ int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
 static __must_check __always_inline int
 __copy_from_user_inatomic(void *dst, const void __user *src, unsigned size)
 {
-	return __copy_from_user_nocheck(dst, (__force const void *)src, size);
+	return __copy_from_user_nocheck(dst, src, size);
 }
 
 static __must_check __always_inline int
 __copy_to_user_inatomic(void __user *dst, const void *src, unsigned size)
 {
-	return __copy_to_user_nocheck((__force void *)dst, src, size);
+	return __copy_to_user_nocheck(dst, src, size);
 }
 
 extern long __copy_user_nocache(void *dst, const void __user *src,
-- 
1.8.1.4


^ permalink raw reply	[flat|nested] 3+ messages in thread

* [tip:x86/build] x86, sparse: Do not force removal of __user when calling copy_to/from_user_nocheck()
  2014-01-03 21:45 [PATCH] x86: Do not force removal of __user when calling copy_to/from_user_nocheck() Steven Rostedt
@ 2014-01-03 22:46 ` tip-bot for Steven Rostedt
  2014-01-04 22:04 ` tip-bot for Steven Rostedt
  1 sibling, 0 replies; 3+ messages in thread
From: tip-bot for Steven Rostedt @ 2014-01-03 22:46 UTC (permalink / raw)
  To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, rostedt, ak, tglx, hpa

Commit-ID:  c7c4c8f1b828b550295f1d937578e3090f3b5d66
Gitweb:     http://git.kernel.org/tip/c7c4c8f1b828b550295f1d937578e3090f3b5d66
Author:     Steven Rostedt <rostedt@goodmis.org>
AuthorDate: Fri, 3 Jan 2014 16:45:00 -0500
Committer:  H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Fri, 3 Jan 2014 14:43:44 -0800

x86, sparse: Do not force removal of __user when calling copy_to/from_user_nocheck()

Commit ff47ab4ff3cdd "x86: Add 1/2/4/8 byte optimization to 64bit
__copy_{from,to}_user_inatomic" added a "_nocheck" call in between
the copy_to/from_user() and copy_user_generic(). As both the
normal and nocheck versions of theses calls use the proper __user
annotation, a typecast to remove it should not be added.
This causes sparse to spin out the following warnings:

arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>

Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140103164500.5f6478f5@gandalf.local.home
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
 arch/x86/include/asm/uaccess_64.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 190413d..12a26b9 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -204,13 +204,13 @@ int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
 static __must_check __always_inline int
 __copy_from_user_inatomic(void *dst, const void __user *src, unsigned size)
 {
-	return __copy_from_user_nocheck(dst, (__force const void *)src, size);
+	return __copy_from_user_nocheck(dst, src, size);
 }
 
 static __must_check __always_inline int
 __copy_to_user_inatomic(void __user *dst, const void *src, unsigned size)
 {
-	return __copy_to_user_nocheck((__force void *)dst, src, size);
+	return __copy_to_user_nocheck(dst, src, size);
 }
 
 extern long __copy_user_nocache(void *dst, const void __user *src,

^ permalink raw reply	[flat|nested] 3+ messages in thread

* [tip:x86/build] x86, sparse: Do not force removal of __user when calling copy_to/from_user_nocheck()
  2014-01-03 21:45 [PATCH] x86: Do not force removal of __user when calling copy_to/from_user_nocheck() Steven Rostedt
  2014-01-03 22:46 ` [tip:x86/build] x86, sparse: " tip-bot for Steven Rostedt
@ 2014-01-04 22:04 ` tip-bot for Steven Rostedt
  1 sibling, 0 replies; 3+ messages in thread
From: tip-bot for Steven Rostedt @ 2014-01-04 22:04 UTC (permalink / raw)
  To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, rostedt, ak, tglx, hpa

Commit-ID:  df90ca969035d3f6c95044e272f75bf417b14245
Gitweb:     http://git.kernel.org/tip/df90ca969035d3f6c95044e272f75bf417b14245
Author:     Steven Rostedt <rostedt@goodmis.org>
AuthorDate: Fri, 3 Jan 2014 16:45:00 -0500
Committer:  H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Sat, 4 Jan 2014 13:54:50 -0800

x86, sparse: Do not force removal of __user when calling copy_to/from_user_nocheck()

Commit ff47ab4ff3cdd "x86: Add 1/2/4/8 byte optimization to 64bit
__copy_{from,to}_user_inatomic" added a "_nocheck" call in between
the copy_to/from_user() and copy_user_generic(). As both the
normal and nocheck versions of theses calls use the proper __user
annotation, a typecast to remove it should not be added.
This causes sparse to spin out the following warnings:

arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>

Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140103164500.5f6478f5@gandalf.local.home
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
 arch/x86/include/asm/uaccess_64.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 190413d..12a26b9 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -204,13 +204,13 @@ int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
 static __must_check __always_inline int
 __copy_from_user_inatomic(void *dst, const void __user *src, unsigned size)
 {
-	return __copy_from_user_nocheck(dst, (__force const void *)src, size);
+	return __copy_from_user_nocheck(dst, src, size);
 }
 
 static __must_check __always_inline int
 __copy_to_user_inatomic(void __user *dst, const void *src, unsigned size)
 {
-	return __copy_to_user_nocheck((__force void *)dst, src, size);
+	return __copy_to_user_nocheck(dst, src, size);
 }
 
 extern long __copy_user_nocache(void *dst, const void __user *src,

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2014-01-04 22:04 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-01-03 21:45 [PATCH] x86: Do not force removal of __user when calling copy_to/from_user_nocheck() Steven Rostedt
2014-01-03 22:46 ` [tip:x86/build] x86, sparse: " tip-bot for Steven Rostedt
2014-01-04 22:04 ` tip-bot for Steven Rostedt

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.