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x86, 386 removal: Remove CONFIG_BSWAP

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All 486+ CPUs support BSWAP, so remove the fallback 386 support
code.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1354132230-21854-5-git-send-email-hpa@linux.intel.com
This commit is contained in:
H. Peter Anvin
2012-11-28 11:50:26 -08:00
parent 7ac468b130
commit e5bb8ad862
4 changed files with 4 additions and 54 deletions
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13
arch/x86/kernel/cpu/bugs.c
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@@ -136,24 +136,15 @@ static void __init check_popad(void)
/*
* Check whether we are able to run this kernel safely on SMP.
*
* - In order to run on a i386, we need to be compiled for i386
* (for due to lack of "invlpg" and working WP on a i386)
* - i386 is no longer supported.
* - In order to run on anything without a TSC, we need to be
* compiled for a i486.
*/
static void __init check_config(void)
{
/*
* We'd better not be a i386 if we're configured to use some
* i486+ only features! (WP works in supervisor mode and the
* new "invlpg" and "bswap" instructions)
*/
#if defined(CONFIG_X86_WP_WORKS_OK) || defined(CONFIG_X86_INVLPG) || \
defined(CONFIG_X86_BSWAP)
if (boot_cpu_data.x86 == 3)
if (boot_cpu_data.x86 < 4)
panic("Kernel requires i486+ for 'invlpg' and other features");
#endif
}