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efi/libstub: Fix gcc error around __umoddi3 for 32 bit builds

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32bit gcc doesn't support modulo operation on 64 bit data. It results in
a __umoddi3 error while building EFI for 32 bit.

Use bitwise operations instead of modulo operations to fix the issue.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Link: https://lore.kernel.org/r/20200625234516.31406-2-atish.patra@wdc.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Atish Patra 2020-06-25 16:45:06 -07:00 committed by Ard Biesheuvel
parent c1aac64ddc
commit 950accbabd
1 changed files with 1 additions and 1 deletions
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2
drivers/firmware/efi/libstub/alignedmem.c
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@ -44,7 +44,7 @@ efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr,
*addr = ALIGN((unsigned long)alloc_addr, align);
if (slack > 0) {
int l = (alloc_addr % align) / EFI_PAGE_SIZE;
int l = (alloc_addr & (align - 1)) / EFI_PAGE_SIZE;
if (l) {
efi_bs_call(free_pages, alloc_addr, slack - l + 1);