diff options
Diffstat (limited to 'arch/tile/mm')
| -rw-r--r-- | arch/tile/mm/fault.c | 8 | ||||
| -rw-r--r-- | arch/tile/mm/homecache.c | 3 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index 0011f06..704f3e8 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -567,6 +567,14 @@ do_sigbus: * since that might indicate we have not yet squirreled the SPR * contents away and can thus safely take a recursive interrupt. * Accordingly, the hypervisor passes us the PC via SYSTEM_SAVE_1_2. + * + * Note that this routine is called before homecache_tlb_defer_enter(), + * which means that we can properly unlock any atomics that might + * be used there (good), but also means we must be very sensitive + * to not touch any data structures that might be located in memory + * that could migrate, as we could be entering the kernel on a dataplane + * cpu that has been deferring kernel TLB updates. This means, for + * example, that we can't migrate init_mm or its pgd. */ struct intvec_state do_page_fault_ics(struct pt_regs *regs, int fault_num, unsigned long address, diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c index 97c478e..fb3b4a5 100644 --- a/arch/tile/mm/homecache.c +++ b/arch/tile/mm/homecache.c @@ -29,6 +29,7 @@ #include <linux/timex.h> #include <linux/cache.h> #include <linux/smp.h> +#include <linux/module.h> #include <asm/page.h> #include <asm/sections.h> @@ -348,6 +349,7 @@ pte_t pte_set_home(pte_t pte, int home) return pte; } +EXPORT_SYMBOL(pte_set_home); /* * The routines in this section are the "static" versions of the normal @@ -403,6 +405,7 @@ struct page *homecache_alloc_pages(gfp_t gfp_mask, homecache_change_page_home(page, order, home); return page; } +EXPORT_SYMBOL(homecache_alloc_pages); struct page *homecache_alloc_pages_node(int nid, gfp_t gfp_mask, unsigned int order, int home) |