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Commit cd95842c authored by Markus Gutschke's avatar Markus Gutschke Committed by Russell King
Browse files

[ARM] 3486/1: Mark memory as clobbered by the ARM _syscallX() macros 

Patch from Markus Gutschke

In order to prevent gcc from making incorrect optimizations, all asm()
statements that define system calls should report memory as
clobbered. Recent versions of the headers for i386 have been changed
accordingly, but the ARM headers are still defective.

This patch fixes the bug tracked at
http://bugzilla.kernel.org/show_bug.cgi?id=6205



Signed-off-by: default avatarMarkus Gutschke <markus@google.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent e0a515bc

drivers/input/touchscreen/corgi_ts.c

+1 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <asm/irq.h>

//#include <asm/irq.h>



#include <asm/arch/sharpsl.h>

#include <asm/arch/hardware.h>

include/asm-arm/unistd.h

+14 −7
Original line number Diff line number Diff line
@@ -410,7 +410,8 @@ type name(void) { \ 
  __asm__ __volatile__ (						\

  __syscall(name)							\

	: "=r" (__res_r0)						\

	: __SYS_REG_LIST() );						\

	: __SYS_REG_LIST()						\

	: "memory" );							\

  __res = __res_r0;							\

  __syscall_return(type,__res);						\

}
@@ -424,7 +425,8 @@ type name(type1 arg1) { \ 
  __asm__ __volatile__ (						\

  __syscall(name)							\

	: "=r" (__res_r0)						\

	: __SYS_REG_LIST( "0" (__r0) ) );				\

	: __SYS_REG_LIST( "0" (__r0) )					\

	: "memory" );							\

  __res = __res_r0;							\

  __syscall_return(type,__res);						\

}
@@ -439,7 +441,8 @@ type name(type1 arg1,type2 arg2) { \ 
  __asm__ __volatile__ (						\

  __syscall(name)							\

	: "=r" (__res_r0)						\

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1) ) );			\

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1) )			\

	: "memory" );							\

  __res = __res_r0;							\

  __syscall_return(type,__res);						\

}
@@ -456,7 +459,8 @@ type name(type1 arg1,type2 arg2,type3 arg3) { \ 
  __asm__ __volatile__ (						\

  __syscall(name)							\

	: "=r" (__res_r0)						\

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2) ) );	\

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2) )		\

	: "memory" );							\

  __res = __res_r0;							\

  __syscall_return(type,__res);						\

}
@@ -474,7 +478,8 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \ 
  __asm__ __volatile__ (						\

  __syscall(name)							\

	: "=r" (__res_r0)						\

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2), "r" (__r3) ) ); \

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2), "r" (__r3) ) \

	: "memory" );							\

  __res = __res_r0;							\

  __syscall_return(type,__res);						\

}
@@ -494,7 +499,8 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) { \ 
  __syscall(name)							\

	: "=r" (__res_r0)						\

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2),		\

			  "r" (__r3), "r" (__r4) ) );			\

			  "r" (__r3), "r" (__r4) )			\

	: "memory" );							\

  __res = __res_r0;							\

  __syscall_return(type,__res);						\

}
@@ -514,7 +520,8 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6 
  __syscall(name)							\

	: "=r" (__res_r0)						\

	: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2),		\

			  "r" (__r3), "r" (__r4), "r" (__r5) ) );	\

			  "r" (__r3), "r" (__r4), "r" (__r5) )		\

	: "memory" );							\

  __res = __res_r0;							\

  __syscall_return(type,__res);						\

}