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[ARM] 4494/1: iop13xx: fix up elf_hwcap compile breakage

Browse source 
arch/arm/boot/compressed/misc.o: In function `valid_user_regs':
misc.c:(.text+0x74): undefined reference to `elf_hwcap'

This triggers after the various elf_hwcap cleanups in:
f884b1cf57
d1cbbd6b41

include/asm-arm/arch-iop13xx/uncompress.h calls cpu_relax while spinning on
a register value.  cpu_relax requires processor.h->ptrace.h->hwcap.h

'elf_hwcap' is defined as an extern, but since the uncompressor does not
link against arch/arm/kernel/setup.c 'elf_hwcap' remains undefined.

Fix is to open code the cpu_relax() call as barrier().

Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Dan Williams 2007-07-20 02:07:31 +01:00 committed by Russell King
parent a8135fcfd0
commit 7dea1b2006
1 changed files with 1 additions and 2 deletions
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3
include/asm-arm/arch-iop13xx/uncompress.h
View file

@ -1,7 +1,6 @@
#include <asm/types.h>
#include <linux/serial_reg.h>
#include <asm/hardware.h>
#include <asm/processor.h>
#define UART_BASE ((volatile u32 *)IOP13XX_UART1_PHYS)
#define TX_DONE (UART_LSR_TEMT | UART_LSR_THRE)
@ -9,7 +8,7 @@
static inline void putc(char c)
{
while ((UART_BASE[UART_LSR] & TX_DONE) != TX_DONE)
cpu_relax();
barrier();
UART_BASE[UART_TX] = c;
}