Eric Lee / smarc-fsl-linux-kernel

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Commit b554cb426a955a267dba524f98f99e29bc947643

Authored by Graf Yang
Committed by David Howells
1 parent eac522ef43
Exists in master and in 39 other branches 8mp-imx_5.4.70_2.3.0, 8qm-imx_5.4.70_2.3.0, emb_imx_lf-5.15.y, emb_lf-6.1.y, imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, imx_4.1.15_1.0.0_ga, pitx_8mp_lf-5.10.y, rt-smarc-imx_4.1.15_1.0.0_ga, rt_linux_5.15.71, smarc-8m-android-11.0.0_2.0.0, smarc-imx6_4.14.98_2.0.0_ga, smarc-imx6_4.9.88_2.0.0_ga, smarc-imx7_4.14.98_2.0.0_ga, smarc-imx7_4.9.11_1.0.0_ga, smarc-imx7_4.9.88_2.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-imx_4.1.15_1.0.0_ga, smarc-imx_4.9.11_1.0.0_ga, smarc-imx_4.9.51_imx8m_ga, smarc-imx_4.9.88_2.0.0_ga, smarc-m6.0.1_2.1.0-ga, smarc-n7.1.2_2.0.0-ga, smarc-rel_imx_4.1.15_1.2.0_ga, smarc_8m_00d0_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.14.78_1.0.0_ga, smarc_8m_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.19.35_1.1.0, smarc_8mm_imx_4.14.78_1.0.0_ga, smarc_8mm_imx_4.14.98_2.0.0_ga, smarc_8mm_imx_4.19.35_1.1.0, smarc_8mm_imx_5.4.24_2.1.0, smarc_8mp_lf-5.10.y, smarc_8mq_imx_5.4.24_2.1.0, smarc_8mq_lf-5.10.y, smarc_imx_lf-5.15.y

NOMMU: support SMP dynamic percpu_alloc 

The percpu code requires more functions to be implemented in the mm core
which nommu currently does not provide.  So add inline implementations
since these are largely meaningless on nommu systems.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>

Showing 1 changed file with 32 additions and 0 deletions Side-by-side Diff

include/linux/vmalloc.h
Diff comments   View file @ b554cb4
... ... @@ -95,10 +95,27 @@
95 95  
96 96 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
97 97 struct page ***pages);
  98 +#ifdef CONFIG_MMU
98 99 extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
99 100 pgprot_t prot, struct page **pages);
100 101 extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
101 102 extern void unmap_kernel_range(unsigned long addr, unsigned long size);
  103 +#else
  104 +static inline int
  105 +map_kernel_range_noflush(unsigned long start, unsigned long size,
  106 + pgprot_t prot, struct page **pages)
  107 +{
  108 + return size >> PAGE_SHIFT;
  109 +}
  110 +static inline void
  111 +unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
  112 +{
  113 +}
  114 +static inline void
  115 +unmap_kernel_range(unsigned long addr, unsigned long size)
  116 +{
  117 +}
  118 +#endif
102 119  
103 120 /* Allocate/destroy a 'vmalloc' VM area. */
104 121 extern struct vm_struct *alloc_vm_area(size_t size);
105 122  
... ... @@ -116,11 +133,26 @@
116 133 extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
117 134  
118 135 #ifdef CONFIG_SMP
  136 +# ifdef CONFIG_MMU
119 137 struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
120 138 const size_t *sizes, int nr_vms,
121 139 size_t align);
122 140  
123 141 void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);
  142 +# else
  143 +static inline struct vm_struct **
  144 +pcpu_get_vm_areas(const unsigned long *offsets,
  145 + const size_t *sizes, int nr_vms,
  146 + size_t align)
  147 +{
  148 + return NULL;
  149 +}
  150 +
  151 +static inline void
  152 +pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
  153 +{
  154 +}
  155 +# endif
124 156 #endif
125 157  
126 158 #endif /* _LINUX_VMALLOC_H */