* [PATCH] x86/alternatives: fixup alternative_call_2
@ 2017-12-25 15:06 Alexey Dobriyan
2018-01-14 11:54 ` Thomas Gleixner
0 siblings, 1 reply; 5+ messages in thread
From: Alexey Dobriyan @ 2017-12-25 15:06 UTC (permalink / raw)
To: tglx, mingo, hpa; +Cc: x86, linux-kernel
The following pattern fails to compile while the same pattern
with alternative_call() does.
if (...)
alternative_call_2(...);
else
alternative_call_2(...);
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
arch/x86/include/asm/alternative.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -218,13 +218,11 @@ static inline int alternatives_text_reserved(void *start, void *end)
*/
#define alternative_call_2(oldfunc, newfunc1, feature1, newfunc2, feature2, \
output, input...) \
-{ \
asm volatile (ALTERNATIVE_2("call %P[old]", "call %P[new1]", feature1,\
"call %P[new2]", feature2) \
: output, ASM_CALL_CONSTRAINT \
: [old] "i" (oldfunc), [new1] "i" (newfunc1), \
- [new2] "i" (newfunc2), ## input); \
-}
+ [new2] "i" (newfunc2), ## input)
/*
* use this macro(s) if you need more than one output parameter
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] x86/alternatives: fixup alternative_call_2
2017-12-25 15:06 [PATCH] x86/alternatives: fixup alternative_call_2 Alexey Dobriyan
@ 2018-01-14 11:54 ` Thomas Gleixner
2018-01-14 12:05 ` [PATCH v2] " Alexey Dobriyan
0 siblings, 1 reply; 5+ messages in thread
From: Thomas Gleixner @ 2018-01-14 11:54 UTC (permalink / raw)
To: Alexey Dobriyan; +Cc: mingo, hpa, x86, linux-kernel
On Mon, 25 Dec 2017, Alexey Dobriyan wrote:
> The following pattern fails to compile while the same pattern
> with alternative_call() does.
>
> if (...)
> alternative_call_2(...);
> else
> alternative_call_2(...);
Sigh. Can we get an explanation WHY it fails ?
>
> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
> ---
>
> arch/x86/include/asm/alternative.h | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> --- a/arch/x86/include/asm/alternative.h
> +++ b/arch/x86/include/asm/alternative.h
> @@ -218,13 +218,11 @@ static inline int alternatives_text_reserved(void *start, void *end)
> */
> #define alternative_call_2(oldfunc, newfunc1, feature1, newfunc2, feature2, \
> output, input...) \
> -{ \
> asm volatile (ALTERNATIVE_2("call %P[old]", "call %P[new1]", feature1,\
> "call %P[new2]", feature2) \
> : output, ASM_CALL_CONSTRAINT \
> : [old] "i" (oldfunc), [new1] "i" (newfunc1), \
> - [new2] "i" (newfunc2), ## input); \
> -}
> + [new2] "i" (newfunc2), ## input)
>
> /*
> * use this macro(s) if you need more than one output parameter
>
^ permalink raw reply [flat|nested] 5+ messages in thread* [PATCH v2] x86/alternatives: fixup alternative_call_2
2018-01-14 11:54 ` Thomas Gleixner
@ 2018-01-14 12:05 ` Alexey Dobriyan
2018-03-26 10:37 ` [tip:x86/asm] x86/alternatives: Fixup alternative_call_2 tip-bot for Alexey Dobriyan
2018-03-27 7:51 ` [tip:x86/pti] " tip-bot for Alexey Dobriyan
0 siblings, 2 replies; 5+ messages in thread
From: Alexey Dobriyan @ 2018-01-14 12:05 UTC (permalink / raw)
To: Thomas Gleixner; +Cc: mingo, hpa, x86, linux-kernel
The following pattern fails to compile while the same pattern
with alternative_call() does:
if (...)
alternative_call_2(...);
else
alternative_call_2(...);
as it expands into
if (...)
{
}; <===
else
{
};
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
arch/x86/include/asm/alternative.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -218,13 +218,11 @@ static inline int alternatives_text_reserved(void *start, void *end)
*/
#define alternative_call_2(oldfunc, newfunc1, feature1, newfunc2, feature2, \
output, input...) \
-{ \
asm volatile (ALTERNATIVE_2("call %P[old]", "call %P[new1]", feature1,\
"call %P[new2]", feature2) \
: output, ASM_CALL_CONSTRAINT \
: [old] "i" (oldfunc), [new1] "i" (newfunc1), \
- [new2] "i" (newfunc2), ## input); \
-}
+ [new2] "i" (newfunc2), ## input)
/*
* use this macro(s) if you need more than one output parameter
^ permalink raw reply [flat|nested] 5+ messages in thread* [tip:x86/asm] x86/alternatives: Fixup alternative_call_2
2018-01-14 12:05 ` [PATCH v2] " Alexey Dobriyan
@ 2018-03-26 10:37 ` tip-bot for Alexey Dobriyan
2018-03-27 7:51 ` [tip:x86/pti] " tip-bot for Alexey Dobriyan
1 sibling, 0 replies; 5+ messages in thread
From: tip-bot for Alexey Dobriyan @ 2018-03-26 10:37 UTC (permalink / raw)
To: linux-tip-commits; +Cc: hpa, tglx, adobriyan, linux-kernel, bp, mingo
Commit-ID: 668120ab7ee4db67618ec75a0ebc93eae6c70034
Gitweb: https://git.kernel.org/tip/668120ab7ee4db67618ec75a0ebc93eae6c70034
Author: Alexey Dobriyan <adobriyan@gmail.com>
AuthorDate: Sun, 14 Jan 2018 15:05:04 +0300
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Mon, 26 Mar 2018 12:32:40 +0200
x86/alternatives: Fixup alternative_call_2
The following pattern fails to compile while the same pattern
with alternative_call() does:
if (...)
alternative_call_2(...);
else
alternative_call_2(...);
as it expands into
if (...)
{
}; <===
else
{
};
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20180114120504.GA11368@avx2
---
arch/x86/include/asm/alternative.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h
index cf5961ca8677..4cd6a3b71824 100644
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -218,13 +218,11 @@ static inline int alternatives_text_reserved(void *start, void *end)
*/
#define alternative_call_2(oldfunc, newfunc1, feature1, newfunc2, feature2, \
output, input...) \
-{ \
asm volatile (ALTERNATIVE_2("call %P[old]", "call %P[new1]", feature1,\
"call %P[new2]", feature2) \
: output, ASM_CALL_CONSTRAINT \
: [old] "i" (oldfunc), [new1] "i" (newfunc1), \
- [new2] "i" (newfunc2), ## input); \
-}
+ [new2] "i" (newfunc2), ## input)
/*
* use this macro(s) if you need more than one output parameter
^ permalink raw reply related [flat|nested] 5+ messages in thread* [tip:x86/pti] x86/alternatives: Fixup alternative_call_2
2018-01-14 12:05 ` [PATCH v2] " Alexey Dobriyan
2018-03-26 10:37 ` [tip:x86/asm] x86/alternatives: Fixup alternative_call_2 tip-bot for Alexey Dobriyan
@ 2018-03-27 7:51 ` tip-bot for Alexey Dobriyan
1 sibling, 0 replies; 5+ messages in thread
From: tip-bot for Alexey Dobriyan @ 2018-03-27 7:51 UTC (permalink / raw)
To: linux-tip-commits; +Cc: adobriyan, bp, mingo, tglx, hpa, linux-kernel
Commit-ID: bd6271039ee6f0c9b468148fc2d73e0584af6b4f
Gitweb: https://git.kernel.org/tip/bd6271039ee6f0c9b468148fc2d73e0584af6b4f
Author: Alexey Dobriyan <adobriyan@gmail.com>
AuthorDate: Sun, 14 Jan 2018 15:05:04 +0300
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Tue, 27 Mar 2018 09:47:53 +0200
x86/alternatives: Fixup alternative_call_2
The following pattern fails to compile while the same pattern
with alternative_call() does:
if (...)
alternative_call_2(...);
else
alternative_call_2(...);
as it expands into
if (...)
{
}; <===
else
{
};
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20180114120504.GA11368@avx2
---
arch/x86/include/asm/alternative.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h
index cf5961ca8677..4cd6a3b71824 100644
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -218,13 +218,11 @@ static inline int alternatives_text_reserved(void *start, void *end)
*/
#define alternative_call_2(oldfunc, newfunc1, feature1, newfunc2, feature2, \
output, input...) \
-{ \
asm volatile (ALTERNATIVE_2("call %P[old]", "call %P[new1]", feature1,\
"call %P[new2]", feature2) \
: output, ASM_CALL_CONSTRAINT \
: [old] "i" (oldfunc), [new1] "i" (newfunc1), \
- [new2] "i" (newfunc2), ## input); \
-}
+ [new2] "i" (newfunc2), ## input)
/*
* use this macro(s) if you need more than one output parameter
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2018-03-27 7:52 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-12-25 15:06 [PATCH] x86/alternatives: fixup alternative_call_2 Alexey Dobriyan
2018-01-14 11:54 ` Thomas Gleixner
2018-01-14 12:05 ` [PATCH v2] " Alexey Dobriyan
2018-03-26 10:37 ` [tip:x86/asm] x86/alternatives: Fixup alternative_call_2 tip-bot for Alexey Dobriyan
2018-03-27 7:51 ` [tip:x86/pti] " tip-bot for Alexey Dobriyan
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.