evie/android_kernel_oneplus_msm8998
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Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: avoid back to back on_each_cpu in cpa_flush_array
  x86, relocs: ignore R_386_NONE in kernel relocation entries
This commit is contained in:
Linus Torvalds 2009-05-26 15:06:12 -07:00
commit cd86a536c8
2 changed files with 8 additions and 16 deletions
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7
arch/x86/boot/compressed/relocs.c
View file

@ -504,8 +504,11 @@ static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
if (sym->st_shndx == SHN_ABS) { if (sym->st_shndx == SHN_ABS) {
continue; continue;
} }
if (r_type == R_386_PC32) { if (r_type == R_386_NONE || r_type == R_386_PC32) {
/* PC relative relocations don't need to be adjusted */ /*
* NONE can be ignored and and PC relative
* relocations don't need to be adjusted.
*/
} }
else if (r_type == R_386_32) { else if (r_type == R_386_32) {
/* Visit relocations that need to be adjusted */ /* Visit relocations that need to be adjusted */

17
arch/x86/mm/pageattr.c
View file

@ -204,30 +204,19 @@ static void cpa_flush_range(unsigned long start, int numpages, int cache)
} }
} }
static void wbinvd_local(void *unused)
{
wbinvd();
}
static void cpa_flush_array(unsigned long *start, int numpages, int cache, static void cpa_flush_array(unsigned long *start, int numpages, int cache,
int in_flags, struct page **pages) int in_flags, struct page **pages)
{ {
unsigned int i, level; unsigned int i, level;
unsigned long do_wbinvd = cache && numpages >= 1024; /* 4M threshold */
BUG_ON(irqs_disabled()); BUG_ON(irqs_disabled());
on_each_cpu(__cpa_flush_range, NULL, 1); on_each_cpu(__cpa_flush_all, (void *) do_wbinvd, 1);
if (!cache) if (!cache || do_wbinvd)
return; return;
/* 4M threshold */
if (numpages >= 1024) {
if (boot_cpu_data.x86 >= 4)
on_each_cpu(wbinvd_local, NULL, 1);
return;
}
/* /*
* We only need to flush on one CPU, * We only need to flush on one CPU,
* clflush is a MESI-coherent instruction that * clflush is a MESI-coherent instruction that