aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2015-07-04 08:58:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-07-04 08:58:50 -0700
commitb1be9ead135939136b87d73004891a6bac35bb43 (patch)
treec6255a4fb19a528bd2e825c66fa5cd54feb038b5
parent22a093b2fb52fb656658a32adc80c24ddc200ca4 (diff)
parentb96fecbfa8c88b057e2bbf10021521c232bb3650 (diff)
downloadlinux-linaro-stable-b1be9ead135939136b87d73004891a6bac35bb43.tar.gz
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar: "Two FPU rewrite related fixes. This addresses all known x86 regressions at this stage. Also some other misc fixes" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/fpu: Fix boot crash in the early FPU code x86/asm/entry/64: Update path names x86/fpu: Fix FPU related boot regression when CPUID masking BIOS feature is enabled x86/boot/setup: Clean up the e820_reserve_setup_data() code x86/kaslr: Fix typo in the KASLR_FLAG documentation
-rw-r--r--Documentation/x86/boot.txt2
-rw-r--r--Documentation/x86/entry_64.txt8
-rw-r--r--arch/x86/kernel/cpu/common.c2
-rw-r--r--arch/x86/kernel/fpu/init.c7
-rw-r--r--arch/x86/kernel/setup.c7
5 files changed, 13 insertions, 13 deletions
diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt
index 7c1f9fad6674..9da6f3512249 100644
--- a/Documentation/x86/boot.txt
+++ b/Documentation/x86/boot.txt
@@ -406,7 +406,7 @@ Protocol: 2.00+
- If 0, the protected-mode code is loaded at 0x10000.
- If 1, the protected-mode code is loaded at 0x100000.
- Bit 1 (kernel internal): ALSR_FLAG
+ Bit 1 (kernel internal): KASLR_FLAG
- Used internally by the compressed kernel to communicate
KASLR status to kernel proper.
If 1, KASLR enabled.
diff --git a/Documentation/x86/entry_64.txt b/Documentation/x86/entry_64.txt
index 33884d156125..c1df8eba9dfd 100644
--- a/Documentation/x86/entry_64.txt
+++ b/Documentation/x86/entry_64.txt
@@ -1,14 +1,14 @@
This file documents some of the kernel entries in
-arch/x86/kernel/entry_64.S. A lot of this explanation is adapted from
+arch/x86/entry/entry_64.S. A lot of this explanation is adapted from
an email from Ingo Molnar:
http://lkml.kernel.org/r/<20110529191055.GC9835%40elte.hu>
The x86 architecture has quite a few different ways to jump into
kernel code. Most of these entry points are registered in
-arch/x86/kernel/traps.c and implemented in arch/x86/kernel/entry_64.S
-for 64-bit, arch/x86/kernel/entry_32.S for 32-bit and finally
-arch/x86/ia32/ia32entry.S which implements the 32-bit compatibility
+arch/x86/kernel/traps.c and implemented in arch/x86/entry/entry_64.S
+for 64-bit, arch/x86/entry/entry_32.S for 32-bit and finally
+arch/x86/entry/entry_64_compat.S which implements the 32-bit compatibility
syscall entry points and thus provides for 32-bit processes the
ability to execute syscalls when running on 64-bit kernels.
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 9fc5e3d9d9c8..922c5e0cea4c 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -742,7 +742,6 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
cpu_detect(c);
get_cpu_vendor(c);
get_cpu_cap(c);
- fpu__init_system(c);
if (this_cpu->c_early_init)
this_cpu->c_early_init(c);
@@ -754,6 +753,7 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
this_cpu->c_bsp_init(c);
setup_force_cpu_cap(X86_FEATURE_ALWAYS);
+ fpu__init_system(c);
}
void __init early_cpu_init(void)
diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c
index fc878fee6a51..32826791e675 100644
--- a/arch/x86/kernel/fpu/init.c
+++ b/arch/x86/kernel/fpu/init.c
@@ -95,11 +95,12 @@ static void __init fpu__init_system_mxcsr(void)
unsigned int mask = 0;
if (cpu_has_fxsr) {
- struct fxregs_state fx_tmp __aligned(32) = { };
+ /* Static because GCC does not get 16-byte stack alignment right: */
+ static struct fxregs_state fxregs __initdata;
- asm volatile("fxsave %0" : "+m" (fx_tmp));
+ asm volatile("fxsave %0" : "+m" (fxregs));
- mask = fx_tmp.mxcsr_mask;
+ mask = fxregs.mxcsr_mask;
/*
* If zero then use the default features mask,
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d3b95b89e9b2..80f874bf999e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -461,19 +461,18 @@ static void __init e820_reserve_setup_data(void)
{
struct setup_data *data;
u64 pa_data;
- int found = 0;
pa_data = boot_params.hdr.setup_data;
+ if (!pa_data)
+ return;
+
while (pa_data) {
data = early_memremap(pa_data, sizeof(*data));
e820_update_range(pa_data, sizeof(*data)+data->len,
E820_RAM, E820_RESERVED_KERN);
- found = 1;
pa_data = data->next;
early_memunmap(data, sizeof(*data));
}
- if (!found)
- return;
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
memcpy(&e820_saved, &e820, sizeof(struct e820map));