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| author | Steven Rostedt <rostedt@goodmis.org> | 2014-01-03 16:45:00 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-06-15 21:28:10 +0100 |
| commit | 7e87888458d3d47606e14befebc35b8821b15a50 (patch) | |
| tree | 59bf0faee8ea15d19221fb1e853ac233db08d49e /arch/x86 | |
| parent | 733037c3c89b259235ff5217096b1c846fe7e6e2 (diff) | |
| download | linux-stable-7e87888458d3d47606e14befebc35b8821b15a50.tar.gz linux-stable-7e87888458d3d47606e14befebc35b8821b15a50.tar.bz2 linux-stable-7e87888458d3d47606e14befebc35b8821b15a50.zip | |
x86, sparse: Do not force removal of __user when calling copy_to/from_user_nocheck()
commit df90ca969035d3f6c95044e272f75bf417b14245 upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Jaccon Bastiaansen <jaccon.bastiaansen@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: mingo@redhat.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: h.zuidam@computer.org
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/uaccess_64.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h index 4f0194bed4cb..31fed191a41e 100644 --- a/arch/x86/include/asm/uaccess_64.h +++ b/arch/x86/include/asm/uaccess_64.h @@ -233,13 +233,13 @@ __must_check unsigned long __clear_user(void __user *mem, unsigned long len); 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, |