diff options
| author | Brian Gerst <bgerst@didntduck.org> | 2007-05-21 12:31:53 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-21 16:56:57 (GMT) |
| commit | 17304383ebc1ce68a88030ac4d18ea549d9578c7 (patch) | |
| tree | ddeebffef6841cc421e9fc9bf5429b4a97057363 /arch/i386/kernel/cpu | |
| parent | d0aff6e6f4e54f79f9c89d147d371bad384454e9 (diff) | |
| download | linux-17304383ebc1ce68a88030ac4d18ea549d9578c7.tar.xz | |
i386: fix PGE mask
cr4 is a 32-bit register, so casting the mask to an unsigned char is wrong,
as it clears more than the PGE bit.
Signed-off-by: Brian Gerst <bgerst@didntduck.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386/kernel/cpu')
| -rw-r--r-- | arch/i386/kernel/cpu/mtrr/cyrix.c | 2 | ||||
| -rw-r--r-- | arch/i386/kernel/cpu/mtrr/state.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/i386/kernel/cpu/mtrr/cyrix.c b/arch/i386/kernel/cpu/mtrr/cyrix.c index 0737a59..9edf562 100644 --- a/arch/i386/kernel/cpu/mtrr/cyrix.c +++ b/arch/i386/kernel/cpu/mtrr/cyrix.c @@ -136,7 +136,7 @@ static void prepare_set(void) /* Save value of CR4 and clear Page Global Enable (bit 7) */ if ( cpu_has_pge ) { cr4 = read_cr4(); - write_cr4(cr4 & (unsigned char) ~(1 << 7)); + write_cr4(cr4 & ~X86_CR4_PGE); } /* Disable and flush caches. Note that wbinvd flushes the TLBs as diff --git a/arch/i386/kernel/cpu/mtrr/state.c b/arch/i386/kernel/cpu/mtrr/state.c index f62ecd1..7b39a2f 100644 --- a/arch/i386/kernel/cpu/mtrr/state.c +++ b/arch/i386/kernel/cpu/mtrr/state.c @@ -19,7 +19,7 @@ void set_mtrr_prepare_save(struct set_mtrr_context *ctxt) /* Save value of CR4 and clear Page Global Enable (bit 7) */ if ( cpu_has_pge ) { ctxt->cr4val = read_cr4(); - write_cr4(ctxt->cr4val & (unsigned char) ~(1 << 7)); + write_cr4(ctxt->cr4val & ~X86_CR4_PGE); } /* Disable and flush caches. Note that wbinvd flushes the TLBs as |