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ca15ca406f
Patch series "mm: cleanup usage of <asm/pgalloc.h>"
Most architectures have very similar versions of pXd_alloc_one() and
pXd_free_one() for intermediate levels of page table. These patches add
generic versions of these functions in <asm-generic/pgalloc.h> and enable
use of the generic functions where appropriate.
In addition, functions declared and defined in <asm/pgalloc.h> headers are
used mostly by core mm and early mm initialization in arch and there is no
actual reason to have the <asm/pgalloc.h> included all over the place.
The first patch in this series removes unneeded includes of
<asm/pgalloc.h>
In the end it didn't work out as neatly as I hoped and moving
pXd_alloc_track() definitions to <asm-generic/pgalloc.h> would require
unnecessary changes to arches that have custom page table allocations, so
I've decided to move lib/ioremap.c to mm/ and make pgalloc-track.h local
to mm/.
This patch (of 8):
In most cases <asm/pgalloc.h> header is required only for allocations of
page table memory. Most of the .c files that include that header do not
use symbols declared in <asm/pgalloc.h> and do not require that header.
As for the other header files that used to include <asm/pgalloc.h>, it is
possible to move that include into the .c file that actually uses symbols
from <asm/pgalloc.h> and drop the include from the header file.
The process was somewhat automated using
sed -i -E '/[<"]asm\/pgalloc\.h/d' \
$(grep -L -w -f /tmp/xx \
$(git grep -E -l '[<"]asm/pgalloc\.h'))
where /tmp/xx contains all the symbols defined in
arch/*/include/asm/pgalloc.h.
[rppt@linux.ibm.com: fix powerpc warning]
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200627143453.31835-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ALPHA_TLBFLUSH_H
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#define _ALPHA_TLBFLUSH_H
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <asm/compiler.h>
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#ifndef __EXTERN_INLINE
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#define __EXTERN_INLINE extern inline
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#define __MMU_EXTERN_INLINE
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#endif
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extern void __load_new_mm_context(struct mm_struct *);
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/* Use a few helper functions to hide the ugly broken ASN
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numbers on early Alphas (ev4 and ev45). */
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__EXTERN_INLINE void
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ev4_flush_tlb_current(struct mm_struct *mm)
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{
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__load_new_mm_context(mm);
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tbiap();
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}
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__EXTERN_INLINE void
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ev5_flush_tlb_current(struct mm_struct *mm)
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{
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__load_new_mm_context(mm);
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}
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/* Flush just one page in the current TLB set. We need to be very
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careful about the icache here, there is no way to invalidate a
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specific icache page. */
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__EXTERN_INLINE void
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ev4_flush_tlb_current_page(struct mm_struct * mm,
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struct vm_area_struct *vma,
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unsigned long addr)
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{
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int tbi_flag = 2;
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if (vma->vm_flags & VM_EXEC) {
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__load_new_mm_context(mm);
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tbi_flag = 3;
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}
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tbi(tbi_flag, addr);
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}
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__EXTERN_INLINE void
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ev5_flush_tlb_current_page(struct mm_struct * mm,
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struct vm_area_struct *vma,
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unsigned long addr)
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{
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if (vma->vm_flags & VM_EXEC)
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__load_new_mm_context(mm);
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else
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tbi(2, addr);
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}
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#ifdef CONFIG_ALPHA_GENERIC
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# define flush_tlb_current alpha_mv.mv_flush_tlb_current
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# define flush_tlb_current_page alpha_mv.mv_flush_tlb_current_page
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#else
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# ifdef CONFIG_ALPHA_EV4
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# define flush_tlb_current ev4_flush_tlb_current
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# define flush_tlb_current_page ev4_flush_tlb_current_page
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# else
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# define flush_tlb_current ev5_flush_tlb_current
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# define flush_tlb_current_page ev5_flush_tlb_current_page
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# endif
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#endif
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#ifdef __MMU_EXTERN_INLINE
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#undef __EXTERN_INLINE
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#undef __MMU_EXTERN_INLINE
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#endif
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/* Flush current user mapping. */
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static inline void
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flush_tlb(void)
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{
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flush_tlb_current(current->active_mm);
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}
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/* Flush someone else's user mapping. */
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static inline void
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flush_tlb_other(struct mm_struct *mm)
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{
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unsigned long *mmc = &mm->context[smp_processor_id()];
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/* Check it's not zero first to avoid cacheline ping pong
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when possible. */
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if (*mmc) *mmc = 0;
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}
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#ifndef CONFIG_SMP
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/* Flush everything (kernel mapping may also have changed
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due to vmalloc/vfree). */
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static inline void flush_tlb_all(void)
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{
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tbia();
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}
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/* Flush a specified user mapping. */
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static inline void
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flush_tlb_mm(struct mm_struct *mm)
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{
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if (mm == current->active_mm)
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flush_tlb_current(mm);
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else
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flush_tlb_other(mm);
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}
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/* Page-granular tlb flush. */
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static inline void
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flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
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{
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struct mm_struct *mm = vma->vm_mm;
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if (mm == current->active_mm)
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flush_tlb_current_page(mm, vma, addr);
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else
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flush_tlb_other(mm);
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}
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/* Flush a specified range of user mapping. On the Alpha we flush
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the whole user tlb. */
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static inline void
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flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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flush_tlb_mm(vma->vm_mm);
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}
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#else /* CONFIG_SMP */
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extern void flush_tlb_all(void);
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extern void flush_tlb_mm(struct mm_struct *);
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extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
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extern void flush_tlb_range(struct vm_area_struct *, unsigned long,
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unsigned long);
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#endif /* CONFIG_SMP */
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static inline void flush_tlb_kernel_range(unsigned long start,
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unsigned long end)
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{
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flush_tlb_all();
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}
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#endif /* _ALPHA_TLBFLUSH_H */
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