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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-08 17:25:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-08 17:25:53 -0700 |
| commit | 6cfcdad7630de2b2eb09740bdc6ee921de8c785e (patch) | |
| tree | fb6f16f55dec1e6164bff60c8d19e2d787819388 /arch | |
| parent | Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
| parent | x86/resctrl: Cleanup cbm_ensure_valid() (diff) | |
| download | linux-dev-6cfcdad7630de2b2eb09740bdc6ee921de8c785e.tar.xz linux-dev-6cfcdad7630de2b2eb09740bdc6ee921de8c785e.zip | |
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cache resource control update from Ingo Molnar:
"Two cleanup patches"
* 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/resctrl: Cleanup cbm_ensure_valid()
x86/resctrl: Use _ASM_BX to avoid ifdeffery
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/rdtgroup.c | 12 |
2 files changed, 7 insertions, 11 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c index f68baccc69f0..d7623e1b927d 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c +++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c @@ -431,11 +431,7 @@ static int pseudo_lock_fn(void *_rdtgrp) #else register unsigned int line_size asm("esi"); register unsigned int size asm("edi"); -#ifdef CONFIG_X86_64 - register void *mem_r asm("rbx"); -#else - register void *mem_r asm("ebx"); -#endif /* CONFIG_X86_64 */ + register void *mem_r asm(_ASM_BX); #endif /* CONFIG_KASAN */ /* diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index 2f4824793798..bf3034994754 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -2488,21 +2488,21 @@ out_destroy: * modification to the CBM if the default does not satisfy the * requirements. */ -static void cbm_ensure_valid(u32 *_val, struct rdt_resource *r) +static u32 cbm_ensure_valid(u32 _val, struct rdt_resource *r) { - unsigned long val = *_val; unsigned int cbm_len = r->cache.cbm_len; unsigned long first_bit, zero_bit; + unsigned long val = _val; - if (val == 0) - return; + if (!val) + return 0; first_bit = find_first_bit(&val, cbm_len); zero_bit = find_next_zero_bit(&val, cbm_len, first_bit); /* Clear any remaining bits to ensure contiguous region */ bitmap_clear(&val, zero_bit, cbm_len - zero_bit); - *_val = (u32)val; + return (u32)val; } /* @@ -2560,7 +2560,7 @@ static int __init_one_rdt_domain(struct rdt_domain *d, struct rdt_resource *r, * Force the initial CBM to be valid, user can * modify the CBM based on system availability. */ - cbm_ensure_valid(&d->new_ctrl, r); + d->new_ctrl = cbm_ensure_valid(d->new_ctrl, r); /* * Assign the u32 CBM to an unsigned long to ensure that * bitmap_weight() does not access out-of-bound memory. |