diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-15 10:02:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-15 10:02:25 -0700 |
| commit | 42576bee6eacda29a3193e97961ab3583a324850 (patch) | |
| tree | 850f5f50941e800bd457cda268d650565ac746d6 /arch/x86/kernel/head64.c | |
| parent | ba33ea811e1ff6726abb7f8f96df38c2d7b50304 (diff) | |
| parent | 25b4caf7c50e8c501310e8c515d8518b1850c948 (diff) | |
Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
"Early command line options parsing enhancements from Dave Hansen, plus
minor cleanups and enhancements"
* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot: Remove unused 'is_big_kernel' variable
x86/boot: Use proper array element type in memset() size calculation
x86/boot: Pass in size to early cmdline parsing
x86/boot: Simplify early command line parsing
x86/boot: Fix early command-line parsing when partial word matches
x86/boot: Fix early command-line parsing when matching at end
x86/boot: Simplify kernel load address alignment check
x86/boot: Micro-optimize reset_early_page_tables()
Diffstat (limited to 'arch/x86/kernel/head64.c')
| -rw-r--r-- | arch/x86/kernel/head64.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 2c0f3407bd1f..1f4422d5c8d0 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -40,13 +40,8 @@ pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX); /* Wipe all early page tables except for the kernel symbol map */ static void __init reset_early_page_tables(void) { - unsigned long i; - - for (i = 0; i < PTRS_PER_PGD-1; i++) - early_level4_pgt[i].pgd = 0; - + memset(early_level4_pgt, 0, sizeof(pgd_t)*(PTRS_PER_PGD-1)); next_early_pgt = 0; - write_cr3(__pa_nodebug(early_level4_pgt)); } @@ -54,7 +49,6 @@ static void __init reset_early_page_tables(void) int __init early_make_pgtable(unsigned long address) { unsigned long physaddr = address - __PAGE_OFFSET; - unsigned long i; pgdval_t pgd, *pgd_p; pudval_t pud, *pud_p; pmdval_t pmd, *pmd_p; @@ -81,8 +75,7 @@ again: } pud_p = (pudval_t *)early_dynamic_pgts[next_early_pgt++]; - for (i = 0; i < PTRS_PER_PUD; i++) - pud_p[i] = 0; + memset(pud_p, 0, sizeof(*pud_p) * PTRS_PER_PUD); *pgd_p = (pgdval_t)pud_p - __START_KERNEL_map + phys_base + _KERNPG_TABLE; } pud_p += pud_index(address); @@ -97,8 +90,7 @@ again: } pmd_p = (pmdval_t *)early_dynamic_pgts[next_early_pgt++]; - for (i = 0; i < PTRS_PER_PMD; i++) - pmd_p[i] = 0; + memset(pmd_p, 0, sizeof(*pmd_p) * PTRS_PER_PMD); *pud_p = (pudval_t)pmd_p - __START_KERNEL_map + phys_base + _KERNPG_TABLE; } pmd = (physaddr & PMD_MASK) + early_pmd_flags; |